forehead - (part of face above eyebrows)

to play (a musical instrument or piece of music)

(formal) To be: the copula, with the same function as だ (da) and です (desu).

entirely, quite; completely; just like, so to speak, as though, as if

to be able to do / to be finished, to be ready / be made / (slang) to have sex, to do it, to get some, to get it on

until now

空で: by heart, by rote

愛でる: love, admire, appreciate

(colloquial) huge, big, severe, intense

既に: already