The katakana syllable フィ (fi). Its equivalent in hiragana is ふぃ (fi).

(music) fortississimo

Short for ファミリーレストラン (famirī resutoran, “family restaurant”).

staff

stuff

a competitive match, a fight, particularly a boxing match / fighting spirit in sports

go for it, take heart, don't give up

(rare) the light spectrum

lifeline, often referring to essential utilities such as water

fan, an enthusiast (of a performer etc.) / handheld fan