weak，意思是虚弱的，弱小的，例如：
1.He became very weak towards the end of his life.他临终时很虚弱。
2.He was a weak little mouse of a man.他是个懦弱无能的人。
3.I was always weak in the science subjects.我总是学不好理科。
4.He heard my weak voice and worried me too much.他听到我虚弱的声音而且非常的担心我。
strong （强壮的），反义词是weak（虚弱的，弱小的）。
strong造句：
He is a strong man。
他是一个强壮的男人。
weak造句：
And even stumbling speech may strengthen a weak tongue.
即使是磕绊的话语也会强壮无力的舌头。
例句：
1.I was too weak to move or think or speak
我太虚弱了，无法动弹，无法思考，也无法说话。
