“complement” vs. “compliment”
Use "complement" (with an e) for things that complete or perfectly match each other, and "compliment" (with an i) for a remark of praise.
complement
"Complement" (with an e) means something that completes, enhances, or perfectly matches something else ("the scarf complements her jacket"). It comes from Latin "complere" (to fill up, to complete), the same root behind "complete" — a spelling and meaning connection that's a genuinely useful memory hook, since "complement" and "complete" share both the "comple-" spelling and the underlying idea of wholeness.
compliment
"Compliment" (with an i) means a remark that expresses praise or admiration ("she gave him a compliment on his presentation"). It comes from a different root entirely: Old French "complimenter," itself from Italian "complimento" and ultimately Latin "complere" as well — but by a separate borrowing path through the social custom of formal courtesy, giving it the narrower modern sense of a polite, flattering remark rather than "complement"'s sense of completion.
The real distinction
Despite the identical pronunciation and shared distant Latin root, the two words serve completely different modern purposes: "complement" is about things fitting together or completing each other, while "compliment" is about praise. A dependable memory anchor is the shared spelling between "complement" and "complete" (both have an e in the same spot), since a complement is quite literally something that completes a pair or a set. Grammar terminology adds a specialized technical sense: in traditional grammar, a "complement" is a word or phrase that completes the meaning of a verb or subject (as in "she seems happy," where "happy" is a subject complement), a term students encounter in grammar class years before they typically learn the everyday sense of matching or completing. Business and hospitality writing shows this mix-up constantly, since phrases like "complimentary breakfast" (free, given as a courtesy) and "a breakfast that complements the room rate" (fits well alongside it) look almost identical on the page but mean entirely different things — a wrongly spelled hotel brochure or menu is one of the most commonly cited real-world examples of this specific error. Because "compliment" and "complimentary" both relate to free gifts or praise offered as a courtesy, while "complement" and its adjective form "complementary" relate strictly to completion or good pairing, keeping the two adjective forms straight (complementary colors that pair well, versus a complimentary drink given for free) is just as important as getting the base nouns right. Spell-checkers are of essentially no help here, since both spellings are valid English words in their own right, and only a reader parsing the sentence's actual meaning, or software sophisticated enough to analyze context, will catch a swapped instance; this makes the pair a favorite example in editing workshops that teach writers not to over-rely on automated spelling tools. Art and design writing shows a particularly clean illustration of the distinction: "complementary colors" (opposite pairs on the color wheel that enhance each other visually, like blue and orange) is a fixed technical term that always takes the e-spelling, never the i-spelling, precisely because the underlying idea is one of visual completion rather than praise.
Examples with “complement”
- The wine complements the meal perfectly.
- Her calm personality complements his energetic style.
- The new hire's skills complement the existing team well.
- This throw pillow complements the sofa nicely.
- The two departments complement each other's strengths.
- A good soundtrack complements the film's mood.
- The side dish complements the main course beautifully.
- Their skill sets complement one another on every project.
Examples with “compliment”
- She gave him a genuine compliment on his speech.
- He received several compliments on his new haircut.
- It was meant as a compliment, not criticism.
- The chef appreciated the compliment on the dessert.
- They exchanged compliments after the performance.
- I took her comment as a compliment.
- He blushed at the unexpected compliment.
- The review was full of compliments for the design.
Memory trick
Remember that "complEment" shares its e with "complEte," a hint that it's about completing or matching something, while "complIment" shares its i with "I," since a compliment is often something nice someone says directly to you. When the sentence is praising or flattering someone, reach for the i-spelling; when it's describing two things fitting well together, reach for the e-spelling instead.