Collocations for unpleasant - adj.

be, feel, look, seem, smell, sound, taste | become, get, turn
Things started to get unpleasant when their neighbours called in the police.

make sth
He may make life unpleasant for the rest of us.

find sb/sth
I found the atmosphere in there extremely unpleasant.

decidedly, deeply, exceedingly, extremely, highly, most, particularly, very | thoroughly
a thoroughly unpleasant man

not altogether, not entirely
The overall feeling was a strange mixture of sensations, not altogether unpleasant.

fairly, pretty, quite, rather, slightly, somewhat
His clothes smelled pretty unpleasant.

for
tests which are unpleasant for patients

to
He was very unpleasant to my friends.