同どう盟めい怠たい業ぎょう

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Meanings

1

noun

go-slow strike; slowdown strike

A labor action where workers reduce their pace rather than stopping work entirely.

同same, agree, equal

盟alliance, oath

怠neglect, laziness

業business, vocation, arts

ストライキ
ストライキ is a full work stoppage, while 同盟怠業 is a slowdown where workers remain on the job but reduce output.
怠たい業ぎょう
怠業 is a general term for work slowdown or slacking, while 同盟怠業 specifically refers to an organized labor action.

Compound of 同盟 (alliance, union) and 怠業 (slowdown, slacking), literally 'alliance slowdown'.