彼女のスカートはぴったり合っている。

she; her; her; girlfriend; sweetheart

indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question

skirt

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

tightly; closely; exactly; precisely; suddenly (stopping); perfectly (suited); ideally

to come together; to merge; to unite; to meet; to fit; to match; to suit; to agree with; to be correct; to be profitable; to be equitable; to do ... to each other; to do ... together