improperly

/ɪmˈpɹɑ.pɚ.li/

//ɪmˈpɹɑ.pɚ.li// adv

By · According to Wiktionary data (CC BY-SA) ·

"improperly" is a 10-letter English headword indexed on PlainSpell.

The verdict

“improperly” has 16 generated spelling variants in the English index at frequency #18,346. The variants make it a useful spelling check.

#18,346
frequency rank, English
2,140
“I” headwords
16
tracked misspellings
1
confusable pair

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - In an improper manner; not properly.

Corpus desk

Index EN-improperly · improperly · English

improperly · rank #18,346 · 16 variants · 1 confusable

  • FREQ-MID #18,346
  • LEN-MEGA 10 letters
  • VOW-4 4 vowels
  • CONFUS-LOW 1 pairs
  • VAR-HIGH 16 variants
  • BOOK-MID 2,140
  • PHOTO-FINISH impoverished

Nearest frequency peer: impoverished (-1 rank slots)

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Rank peers near misspelling magnet “improperly”

Same rarity band: useful when a typo lands on a peer headword

corpus weight

What this shows “improperly” sits among these FrequencyWords peers; misspelling depth is tracked separately in the edit-distance chart.

Source FrequencyWords open word-frequency list As of September 3, 2026

Visual similarity to commonly confused words

How many letter changes separate each confused pair (Levenshtein distance, normalized).

improperly vs improper
80% similar

Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).

Key facts for improperly
PropertyValue
Headwordimproperly
LanguageEnglish
Part of speechAdverb
IPA/ɪmˈpɹɑ.pɚ.li/
Letters10
Frequency rank#18,346
Misspellings tracked16
Confusable pairs1
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “improperly”

This scale runs from the tiny cluster of words that carry ordinary speech (left) to the long tail of words almost nobody reaches for (right).improperlylands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

Scale is logarithmic (each tick is 10× rarer). Same rarity band neighbours include “impoverished” (#18,345), “ingenious” (#18,347), “illumination” (#18,344). Among 2,140 “I” headwords, “improperly” is #18,346. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 16 spelling variants around improperly (IPA /ɪmˈpɹɑ.pɚ.li/), anadverb. Corpus frequency is #18,346 among 2,140 “I” headwords. Dominant gloss: "In an improper manner; not properly.".

Our generated misspelling index lists 16 likely wrong-spelling variants for improperly, with forms such as "immproperly", "imporperly", and "impproperly". Each variant is a distinct typo pattern an edit-distance generator flags, typically a doubled-consonant error, a silent-letter drop, or a vowel substitution. It also participates in 1 confusable-pair relationship, "improper", where similar look or sound leads writers to substitute one word for another in context.

Etymologically, the entry records: From Middle English improprelich, impropreliche, impropurly, inproperlye; equivalent to improper + -ly or im- + properly. The correct English form is improperly, spelled I-M-P-R-O-P-E-R-L-Y.

Definition

  1. 1
    In an improper manner; not properly.

Recorded use

Wiktionary example

These source excerpts show how improperly appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. Prosecutors also said Wednesday their side “does not intend to reference allegations that the defendant violated FARA or improperly coordinated with the Obama Administration,” referring to the Foreign Agents Registration Act, which requires people who lobby on behalf of foreign clients to register beforehand with the US government.

Etymology

From Middle English improprelich, impropreliche, impropurly, inproperlye; equivalent to improper + -ly or im- + properly.

This word in other languages

impropriamente(Español)improprement(Français)

Common misspellings

Also misspelled as:

  • immproperly
  • imporperly
  • impproperly
  • improeprly
  • impropelry
  • improperlly
  • improperlyy
  • improperrly
  • improperyl
  • impropperly
  • improprely
  • imprpoerly
  • imprroperly
  • imrpoperly
  • ipmroperly
  • miproperly

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of improperly - counted as single-character edits (an insertion, a deletion, or a substituted letter). The larger the bar, the easier the typo is to spot; one-edit slips are the ones that sneak past readers.

immproperly1imporperly2impproperly1improeprly2impropelry2improperlly1improperlyy1improperrly1
Edit distance from "improperly"

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "improperly"?
"improperly" is spelled I-M-P-R-O-P-E-R-L-Y. The IPA pronunciation is /ɪmˈpɹɑ.pɚ.li/.
What does "improperly" mean?
As an adverb, "improperly" means: In an improper manner; not properly.
What words are commonly confused with "improperly"?
"improperly" is commonly confused with "improper". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "improperly"?
The IPA (International Phonetic Alphabet) transcription for "improperly" is /ɪmˈpɹɑ.pɚ.li/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "improperly"?
From Middle English improprelich, impropreliche, impropurly, inproperlye; equivalent to improper + -ly or im- + properly. See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "improperly", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 10 letters (nearest by frequency rank).

McLaughlin#18,366fourteenth#18,313ostensibly#18,382pleasantly#18,397

Similar misspelling depth

Headwords with a similar count of attested misspellings (16 here; floor ≥5).

illumination16 variantsinquisition16 variantscontradict16 variantsconspicuous16 variants

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list