adj.characterized by toilsome effort to the point of exhaustion; especially physical effort

同義詞：arduousbackbreakinggruelinggruellinghardheavylaboriousoperosepunishingtoilsome

Back-Breaking
Back-breaking
A back-breaking workload
UK will surge without the EU's back-breaking red tape, declares Boris
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Spinal groups suffer back-breaking suits
Back-breaking loss
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Back-breaking sport?