weighty
adjective uk/ˈweɪ.ti/ us/ˈweɪ.t̬i/
(HEAVY)
重的，沉重的
heavy
I don't want to carry this bag around all afternoon - it's pretty weighty. 我不想整个下午到哪儿都带着这个包——它相当沉。
(SERIOUS)
重要的，重大的；严重的
A weighty subject, book, or piece of work is important or serious.
weighty matters/issues 举足轻重的事件／问题