3VERB [usually passive]深受…困扰;使极为苦恼 If you are assailed by something unpleasant such as fears or problems, you are greatly troubled by a large number of them. 深受…困扰;使极为苦恼 [written]
She is assailed by self-doubt and emotional insecurity. [beVERB-ed]
4VERB (声音或气味)侵入,刺激 If you say that a loud sound or a strong smell assails someone's ears or nostrils, you are emphasizing that it is very intense and seems shocking or unpleasant. (声音或气味)侵入,刺激 [written, emphasis]
The scent of burning metal assailed his nostrils. [VERB noun]