ばたあし【ばた足】
〔水泳で〕the flutter kick
ばたっ
1〔打ち当たる音〕雨戸がばたっと倒れたThe shutter fell with a crash.疲れていたのでばたっとベッドに倒れ込んだI was so tired that I just c...
ばたつく
子どもは手足をばたつかせて泣いたThe child was crying and thrashing his arms and legs about.
ばたばた
1〔音〕のぼりが風でばたばたはためいているThe flag is flapping in the wind.廊下をばたばた歩いていったHe tramped noisily down the ha...
ばたふらいこうか【バタフライ効果】
the butterfly effect (which indicates that a small occurrence in one part of the world may bring about a significant change in the universe)