also: ワックワク
noun or participle which takes 'suru', adverb, adverb taking the 'to' particle
excited; thrilled; nervous with anticipation
Onomatopoeic word describing a fluttering, eager feeling of excitement or anticipation, often positive but can include nervousness. Used as an adverb with する or と, or as a noun.
明日の旅行が楽しみで、わくわくしている。
I'm excited about tomorrow's trip.
プレゼントを開けるとき、わくわくした。
I felt thrilled when opening the present.