blunder
https://gyazo.com/5960a230ce27be7d521653ec4a3f972e
source: Lion Takes A Misstep GIF by Kolafie | Gfycat
noun
a stupid or careless mistake.
(不注意で愚かな)大失策, 不覚, 不手際
verb no object
make a stupid or careless mistake; act or speak clumsily:
(不注意のせいで)大失敗する; しどろもどろに言う(on)
e.g. the mayor and the City Council have blundered in an ill-advised campaign
e.g. I blundered on in my explanation
e.g. (as adjective blundering) : blundering actors.
move clumsily or as if unable to see:
〖blunder＋副詞〗 (目が見えないかのように)恐る恐る進む; ぶつかる, つまずく; (困難な状況に)陥る (!〖副詞〗は方向の表現)
e.g. we were blundering around in the darkness.
DERIVATIVES
blunderer |ˈblənd(ə)rər| noun
blunderingly adverb
ORIGIN
Middle English: probably of Scandinavian origin and related to blind.