“Being at one's wit's end” in Japanese
Short answer
Being at one's wit's end in Japanese is “思案投首” (shiannagekubi). Full meaning: being at one's wit's end, being (quite) at a loss (what to do).
Other ways to say “Being at one's wit's end” in Japanese
閉口頓首
heikoutonshu being at a complete loss as to what to do, being at one's wit's end, being at a loss for an answer
手も足も出ない
temoashimodenai cannot do a thing, feeling handcuffed, being at the end of one's tether, being at one's wit's end
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