of a sudden の意味「突然に」

意味	突然に急に思いがけず suddenly and unexpectedly
例文	Of a sudden, the lights went out. 突然、電気が消えた。 She appeared of a sudden. 彼女は突然現れた。

of a suddenのWordNet

意味	quickly and without warning; happening unexpectedly; on impulse; without premeditation 素早く予告なしに；思いがけず起きて；衝動的に；事前の計画なしに
同義語	all of a sudden dead abruptly on the spur of the moment short suddenly
例文	he stopped suddenly 彼は突然立ち止まった suddenly she felt a sharp pain in her side 突然、彼女は脇腹に鋭い痛みを感じた he decided to go to Chicago on the spur of the moment 彼は思い立ってシカゴへ行くことにした he made up his mind suddenly 彼は衝動的に決心した