decide/ dɪ'saɪd /

1.vt.[+question] [ argument] 
(settle) 解决

2.vt.[+person] 
(persuade) 使下决心

I don't know what decided me to come.
我不知道什么使我下决心来这儿。
3.vi.
决定

to decide to do sth
决定做某事
to decide on {or} upon sth
决定某事
to decide in favour of/against (doing) sth
决定(做)某事/反对(做)某事
to decide that...
决定…
I can't decide whether...
我无法决定是否…