tantamount
Longman Dictionary of Contemporary English 5++LDOCE 5++tan·ta·mount /ˈtæntəmaʊnt/ adjective be tantamount to something ALMOSTif an action, suggestion, plan etc is tantamount to something bad, it has the same effect or is almost as bad 〔行动、建议、计划等〕（几乎）等于某（坏）事，无异于某（坏）事 To leave a dog home alone is tantamount to cruelty. 把狗独自留在家里等于虐待。
Examples from the Corpus
tantamount• Critics say the arrangement is tantamount to a dictatorship.• A simple error of judgement was tantamount to artistic suicide.• With Harry, omission was tantamount to deceit.• Forcibly settling the Jarawa would be tantamount to genocide, leading to them being wiped out.• In Michael's mind it was tantamount to mutiny and he would not stand for anyone disagreeing with him.• For campaign strategists, this was tantamount to spinning straw into gold.• At its worst, the life of faith is portrayed in a way that it is tantamount to spiritual repression.Origin tantamount (1600-1700) tantamount “something equal in value” ((1600-1700)), from Anglo-French tant amunter “to amount to as much”tan·ta·mount adjectiveChineseSyllable
suggestion, is Corpus to plan action, an etc tantamount bad, something if
tantamount
tan‧ta‧mount /ˈtæntəmaʊnt/
adjective
To leave a dog home alone is tantamount to cruelty.
tan‧ta‧mount /ˈtæntəmaʊnt/
adjective Date: 1600-1700
Origin: tantamount 'something equal in value' (1600-1700), from Anglo-French tant amunter 'to amount to as much'
be tantamount to something if an action, suggestion, plan etc is tantamount to something bad, it has the same effect or is almost as bad:Origin: tantamount 'something equal in value' (1600-1700), from Anglo-French tant amunter 'to amount to as much'