Collocations for undesirable - adj.

be, seem
make sth
consider sth, deem sth, regard sth as, see sth as

extremely, fairly, very, etc.
highly
a situation which is highly undesirable

totally
clearly, obviously
It is clearly undesirable for the issue to be ignored.

economically, politically, socially
Why is he mixing with socially undesirable types?
It was felt that big cars were socially and economically undesirable.

Undesirable is used with these nouns:
alien, behaviour, effect, side effect, trait