friendly的反义词是: hostile
They were not tested in hostile environments .
它们不是在恶劣的环境下进行试验的。
Billy's glance was hostile .
比利的眼光是带着憎恨的。
Generally speaking, the universe is hostile to man .
一般说来，宇宙对人类是不友好的。
It neither offends us, nor can we deem it hostile .
它既不触犯我们，我们也不认为它怀有敌意。
He found the atmosphere curiously sullen and hostile .
他发现那里的气氛阴沉得奇怪而且充满敌意。
