as to

prep

"as-to" is a 4-letter English headword indexed on PlainSpell.

The verdict

“as to” is uncommon English (outside the top frequency list), classed as a preposition. The kind of spelling people second-guess.

Unranked
below top-frequency English
5
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - With reference or regard to.

Corpus desk

Index EN-as-to · as to · English

as to · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MID 5 letters
  • VOW-2 2 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "A" thin
  • PHOTO-UNK Peer pending

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.

Key facts for as to
PropertyValue
Headwordas to
LanguageEnglish
Part of speechPreposition
Letters5
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “as to” in English

as toranks outside the top 100,000 English headwords, in the long tail of specialist, archaic, or seldom-used vocabulary, exactly the territory where a reader stops mid-sentence to double-check spelling.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

as to is uncommon English outside the top frequency list, classed as apreposition. Rarity is why readers land here mid-draft. 2 senses are on record.

Zero misspellings are on record for as to in our index, a sign its spelling follows regular English conventions. Our dataset records no confusable match here, since no other headword is close enough in sound or shape to pair with it.

No borrowing history is documented for this entry, so spelling patterns must be inferred from the word's phoneme-to-grapheme mapping rather than from a documented borrowing chain. The correct English form is as to, spelled A-S- -T-O.

Definition

  1. 1
    With reference or regard to.
  2. 2
    According to; in a manner conforming or corresponding to; in proportion.

Recorded use

Wiktionary examples

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

  1. As to your earlier question, I don't think I know the answer.
  2. An argument as to what department is responsible.

Synonyms

This word in other languages

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "as to"?
"as to" is spelled A-S- -T-O.
What does "as to" mean?
As a preposition, "as to" means: With reference or regard to.
What language does "as to" come from?
"as to" is a English word. PlainSpell covers definitions, pronunciations, and spelling data across English, Spanish, Portuguese, French, and German.
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.

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

Source: FrequencyWords open word-frequency list