oh-dark-thirty
Definition, pronunciation, etymology, and usage for the English word. Free spelling reference powered by Wiktionary.
Letters
14 characters
Language
English
word origin
Source
Wiktionary
open dictionary
Access
Free
no sign-up needed
Detailed reference entry for the English word "oh-dark-thirty", 14-letters, with pronunciation in International Phonetic Alphabet notation, etymology traced through Germanic and Romance roots where applicable, common misspelling variants catalogued from Wiktionary, and usage frequency ranked against an open word-frequency list covering the top 100,000 English words. PlainSpell covers English, Spanish, Portuguese, French, and German spelling with confusable-pair detection that highlights visually and phonetically similar words. This entry for "oh-dark-thirty" includes synonyms, antonyms, homophones, and cross-language translation pointers sourced from Wiktionary via the kaikki.org extract. Whether you are verifying the correct spelling of "oh-dark-thirty" for academic writing, checking homophone confusion, or exploring etymological origins, this page provides a citation-backed, free reference that requires no sign-up.
oh dark thirty is aEnglishnoun. It means: Some unspecified hour in the early morning (implying an unpleasant time to be awake).
Compare similar words
See how oh dark thirty compares against similar English words.
Browse all word comparisons →| Property | Value |
|---|---|
| Headword | oh dark thirty |
| Language | English |
| Part of speech | Noun |
| Letters | 14 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Frequency rank visualization
Spelling & Dictionary Insight
The English entry for oh dark thirty is 14 letters long, classified as anoun. It sits outside the most-frequent rank tiers, which is often why uncommon words generate more spelling variants per reader.The dominant gloss from Wiktionary reads: "Some unspecified hour in the early morning (implying an unpleasant time to be awake).".
No misspelling variants are generated for oh dark thirty in our index, suggesting the orthography follows predictable English patterns.It is not paired with a close-neighbour confusable in our dataset, which tends to mean the word is visually distinctive enough to stand on its own.
Etymologically, the entry records: From U.S. military terminology, in which hours before 10:00 am are prefixed with a zero, read as "oh", as in 0530, oh five-thirty, for 5:30 am. Root origin matters for spelling because borrowed morphemes (Greek, Latin, Old French, Old English) carry their source-language orthographic conventions into modern English, which is why historical etymology is often the cleanest predictor of whether a cluster like "-ough", "-eau", or "-tion" will appear. For readers arriving here from a spelling check, the authoritative guidance is: the correct English form is oh dark thirty, spelled O-H- -D-A-R-K- -T-H-I-R-T-Y, and any other sequence of those letters, regardless of how natural it feels, is a misspelling in standard orthography.
Definition
- 1Some unspecified hour in the early morning (implying an unpleasant time to be awake).
Etymology
From U.S. military terminology, in which hours before 10:00 am are prefixed with a zero, read as "oh", as in 0530, oh five-thirty, for 5:30 am.
Frequently Asked Questions
How do you spell "oh dark thirty"?
What does "oh dark thirty" mean?
What is the origin of the word "oh dark thirty"?
Is PlainSpell free to use?
Nearby English words
Other entries that begin with the letter O in our English index: