onerous

Spelling & Dictionary Insight

The English entry for onerous is 7 letters long, classified as anadj, and transcribed in the International Phonetic Alphabet as /ˈɒnəɹəs/. Corpus data places it at rank #32,104 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it.The dominant gloss from Wiktionary reads: "Imposing or constituting a physical, mental, or figurative load which can be borne only with effort; burdensome.".

Our Hunspell-derived misspelling index lists 9 documented wrong-spelling variants for onerous, with forms such as "noerous", "oenrous", and "oneorus". Each variant represents a distinct typo pattern that appears often enough in corpora to be worth flagging, typically a doubled-consonant error, a silent-letter drop, or a vowel substitution.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 Middle English onerous, from Middle French onereux, from Old French onereus, from Latin onerosus (“burdensome”), from onus (“load”). Compare exonerate. 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 onerous, spelled O-N-E-R-O-U-S, and any other sequence of those letters, regardless of how natural it feels, is a misspelling in standard orthography.