hydro-
/ˈhaɪ.dɹoʊ/
"hydro" is a 5-letter English headword indexed on PlainSpell.
The verdict
“hydro-” is uncommon English (outside the top frequency list), classed as a prefix. The kind of spelling people second-guess.
- Unranked
- below top-frequency English
- 6
- letters
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - water
Corpus desk
Index EN-hydro · hydro- · English
hydro- · unranked · 0 variants · 0 confusables
- FREQ-UNRANKED Unranked
- LEN-LONG 6 letters
- VOW-2 2 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-THIN "H" 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.
| Property | Value |
|---|---|
| Headword | hydro- |
| Language | English |
| Part of speech | Prefix |
| IPA | /ˈhaɪ.dɹoʊ/ |
| Letters | 6 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “hydro-” in English
Rare enough to double-check
hydro- is uncommon English outside the top frequency list, classed as aprefix, transcribed /ˈhaɪ.dɹoʊ/. Rarity is why readers land here mid-draft. 5 senses are on record.
Zero misspellings are on record for hydro- in our index, which points to an orthography that plays by predictable English rules. Our confusable-pair dataset has no match for it, suggesting its spelling stands apart enough that readers rarely confuse it with something else.
Etymologically, the entry records: From Ancient Greek ὑδρο- (hudro-), from ὕδωρ (húdōr, “water”). The correct English form is hydro-, spelled H-Y-D-R-O--.
Definition
- 1water
- 2liquid
- 3hydrogen
- 4a hydrous compound
- 5Hydrozoa
Etymology
From Ancient Greek ὑδρο- (hudro-), from ὕδωρ (húdōr, “water”).
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.