anhydrous
"anhydrous" is a 9-letter English headword indexed on PlainSpell.
The verdict
“anhydrous” is uncommon English (frequency #58,504 among 3,931 “A” headwords), classed as an adjective. The kind of spelling people second-guess.
- #58,504
- frequency rank, English
- 3,931
- “A” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Having little or no water.
Corpus desk
Index EN-anhydrous · anhydrous · English
anhydrous · rank #58,504 · 0 variants · 0 confusables
- FREQ-RARE #58,504
- LEN-LONG 9 letters
- VOW-4 4 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 3,931
- PHOTO-FINISH anally
Nearest frequency peer: anally (-2 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.
Long-tail ranks near “anhydrous”
Sparse band: bars invert rank so rarer forms read shorter
- AMOLED
AMOLED
41,501 corpus weight
- amputate
amputate
41,500 corpus weight
- anally
anally
41,499 corpus weight
- anhydrous
anhydrous
41,497 corpus weight
- anteriorly
anteriorly
41,494 corpus weight
- après
après
41,492 corpus weight
What this shows Long-tail view: where “anhydrous” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | anhydrous |
| Language | English |
| Part of speech | Adjective |
| Letters | 9 |
| Frequency rank | #58,504 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “anhydrous” in English
Rare enough to double-check
anhydrous is uncommon English at frequency #58,504 among 3,931 “A” headwords, classed as anadjective. Rarity is why readers land here mid-draft. 2 senses are on record.
The misspelling generator found no plausible variants for anhydrous, a straightforward case of a spelling with little room for common typos. No close-neighbour confusable shows up for this headword in our dataset, which typically means the spelling is too distinctive to be mistaken for another word.
Etymologically, the entry records: From an- + Ancient Greek ὕδωρ (húdōr, “water”) + -ous. The correct English form is anhydrous, spelled A-N-H-Y-D-R-O-U-S.
Definition
- 1Having little or no water.
- 2Having no water of crystallization.
Recorded use
Wiktionary exampleThese source excerpts show how anhydrous appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
Volatiles of kecap manis and its raw materials were extracted using Likens-Nickerson apparatus with diethyl ether as the extraction solvent. The extracts were then dried with anhydrous sodium sulfate, concentrated using a rotary evaporator followed by flushing using nitrogen until the volume was about 0.5 ml.
Etymology
From an- + Ancient Greek ὕδωρ (húdōr, “water”) + -ous.
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); 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
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "anhydrous", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 9 letters (nearest by frequency rank).