несовер. - выдыхаться
совер. - выдохнуться возвр.
1) lose smell/fragrance/taste/zest
become flat (о вине и т.п.)
2) перен. exhaust oneself, get exhausted, become stale, be played out, be used up
fizzle out, be a wash-out, bog down, peter out разг.
vr. to get exhausted