silly

/ˈsɪl.i/

//ˈsɪl.i// adj

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

"silly" is a 5-letter English headword indexed on PlainSpell.

The verdict

“silly” is a regularly-used English word, ranked #3,727 in English word frequency and used as an adjective.

#3,727
frequency rank, English
5
letters
6
tracked misspellings
20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Laughable or amusing through foolishness or a foolish appearance.

Visual similarity to commonly confused words

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

silly vs sly
60% similar
silly vs slay
60% similar
silly vs silo
60% similar

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

Key facts for silly
PropertyValue
Headwordsilly
LanguageEnglish
Part of speechAdjective
IPA/ˈsɪl.i/
Letters5
Frequency rank#3,727
Misspellings tracked6
Confusable pairs20
SourceWiktionary (kaikki.org)

Where “silly” sits in English frequency

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right). silly lands here:

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

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

Spelling & Dictionary Insight

The English entry for silly is 5 letters long, classified as an adjective, and transcribed in the International Phonetic Alphabet as /ˈsɪl.i/. Corpus data places it at rank #3,727 in overall English word frequency, indicating it appears regularly in written and spoken text. Wiktionary records 17 distinct senses for this headword, so context determines which meaning a reader should apply.

Our generated misspelling index lists 6 likely wrong-spelling variants for silly, with forms such as "islly", "sillyy", and "sily". Every one of these variants traces to a single-character edit -- an added or dropped letter, a swapped consonant, or a vowel swap -- the kind of slip a spell-checker is built to catch. It also participates in 20 confusable-pair relationships, "sly", "slay", "silo", and more, where similar look or sound leads writers to substitute one word for another in context.

Etymologically, the entry records: From Middle English seely, sēlī, from Old English sǣliġ, ġesǣliġ (“lucky, fortunate”), from Proto-West Germanic *sālīg, from *sāli; equivalent to seel (“happiness, bliss”) + -y. Doublet of Seelie. The semantic evolution is “lucky” to “innocent” to “naive” t… The correct English form is silly, spelled S-I-L-L-Y.

Definition

  1. 1
    Laughable or amusing through foolishness or a foolish appearance.
  2. 2
    Laughable or amusing through foolishness or a foolish appearance.
  3. 3
    Blessed
  4. 4
    Blessed
  5. 5
    Pitiful, inspiring compassion, particularly
  6. 6
    Pitiful, inspiring compassion
  7. 7
    Pitiful, inspiring compassion
  8. 8
    Pitiful, inspiring compassion
  9. 9
    Pitiful, inspiring compassion
  10. 10
    Pitiful, inspiring compassion
  11. 11
    Simple, plain
  12. 12
    Simple, plain
  13. 13
    Mentally simple, foolish
  14. 14
    Mentally simple, foolish
  15. 15
    Mentally simple, foolish
  16. 16
    Mentally simple, foolish
  17. 17
    Very close to the batsman, facing the bowler; closer than short.

Etymology

From Middle English seely, sēlī, from Old English sǣliġ, ġesǣliġ (“lucky, fortunate”), from Proto-West Germanic *sālīg, from *sāli; equivalent to seel (“happiness, bliss”) + -y. Doublet of Seelie. The semantic evolution is “lucky” to “innocent” to “naive” to “foolish”. Compare the similar evolution of daft (originally meaning “accommodating”), and almost the reverse with nice (originally meaning “ignorant”).

Synonyms

charmingAlso see Thesaurus:foolish

Antonyms

pious

This word in other languages

bobo(Español)sot(Français)doof(Deutsch)bobo(Português)

Common misspellings

Also misspelled as: islly,sillyy,sily,silyl,slily,ssilly

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of silly - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.

islly2sillyy1sily1silyl2slily2ssilly1
Edit distance from "silly"

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 "silly"?
"silly" is spelled S-I-L-L-Y. The IPA pronunciation is /ˈsɪl.i/.
What does "silly" mean?
As an adjective, "silly" means: Laughable or amusing through foolishness or a foolish appearance.
What words are commonly confused with "silly"?
"silly" is commonly confused with "sly", "slay", "silo". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "silly"?
The IPA (International Phonetic Alphabet) transcription for "silly" is /ˈsɪl.i/. 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 "silly"?
From Middle English seely, sēlī, from Old English sǣliġ, ġesǣliġ (“lucky, fortunate”), from Proto-West Germanic *sālīg, from *sāli; equivalent to seel (“happiness, bliss”) + -y. Doublet of Seelie. The semantic evolution is “lucky” to “innocent” to... 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.

Using “silly”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct English spelling is S-I-L-L-Y - every other letter order is a misspelling in standard orthography.
  • Say it as /ˈsɪl.i/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
  • Don't mix it up with “sly” - see the side-by-side comparison. silly vs sly
  • Browse more English words and confusable pairs in the same reference. English words
Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

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

Source: FrequencyWords open word-frequency list FrequencyWords open word-frequency list