impulse

Spelling & Dictionary Insight

The English entry for impulse is 7 letters long, classified as anoun, and transcribed in the International Phonetic Alphabet as /ˈɪmpʌls/. Corpus data places it at rank #10,866 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it.Wiktionary records 3 distinct senses for this headword, so context determines which meaning a reader should apply.

Our Hunspell-derived misspelling index lists 10 documented wrong-spelling variants for impulse, with forms such as "immpulse", "impluse", and "imppulse". 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 also participates in 5 confusable-pair relationships, "impure", "impulses", "impulsive", and more, where similar look or sound leads writers to substitute one word for another in context.

Etymologically, the entry records: Borrowed from Middle French impulser, from Latin impulsus. For spelling, as in pulse, the -e (on -lse) is so the end is pronounced /ls/, rather than /lz/ as in pulls, and does not change the vowel (‘u’). Compare else, false, convulse. 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 impulse, spelled I-M-P-U-L-S-E, and any other sequence of those letters, regardless of how natural it feels, is a misspelling in standard orthography.