suffer
/ ?s?f?(r); ˋs?f?/ v
[I, Ipr] ~ (from/with/for sth) feel pain, discomfort, great sorrow, etc 感到疼痛、 不適、 悲傷等; 受苦; 吃苦頭: Do you suffer from (ie often have) headaches? 妳常頭痛嗎? * She's suffering from loss of memory. 她患有遺忘癥. * He suffers terribly with (ie is pained by) his feet. 他的腳痛得不得了. * He made a rash decision now he's suffering for it. 他做決定太倉促--現在可吃到苦頭了. * Think how much the parents of the kidnapped boy must have suffered. 那個男孩兒給拐走了, 想想看他父母得多傷心哪.
[Tn] experience or undergo (sth unpleasant) 經歷或遭受（不愉快之事）: suffer pain, torture, defeat 遭受痛苦、 折磨、 失敗 * We suffered huge losses in the financial crisis. 我們在金融危機中損失慘重.
[I] become worse; lose quality 變壞; 變差; 變糟: Your studies will suffer if you play too much football. 妳要是總踢足球, 功課就糟了. * Her business suffered (eg made less profit) when she was ill. 她患病時, 生意受到了影響.
[Tn] (fml 文) tolerate (sth); stand 忍受, 容忍（某事物）; 經得起: How can you suffer such insolence? 妳怎能忍受這樣的侮辱呢?
(idm 習語) not/never suffer `fools gladly not be patient with people whom one considers to be foolish 對自己認為很笨的人缺乏耐心: an arrogant, impatient woman who doesn't suffer fools gladly 不願與笨人為伍的高傲而無耐性的女子.
可見，suffer後面直接是痛苦的東西，如losses,insolence;而suffer from是從事件中感到痛苦，如accident之類