捣乱

(v) cause a disturbance

(v) look for trouble; intentionally bother sb

make trouble

put sand in the wheels

rock the boat

mix it

spanner in the works

muck (bar)

捣乱[dǎoluàn]

他存心捣乱。
He means (to cause) trouble.

把这些捣乱分子赶出去。
Let's pitch out the troublemakers.

只要有几个爱捣乱的学生，就能把全班搅乱。
A few disruptive students can easily ruin a class.

今天的比赛有警察防备著捣乱分子。
Police will be looking out for trouble-makers at today's match.

他如果再来这里捣乱，我就会把他臭骂一顿。
If he comes here again and tries to make trouble, he'll get an earful from me.