Collocations for unacceptable - adj.

be, prove, seem | become | remain | make sth
The cost of these proposed changes makes them unacceptable.

consider sth, deem sth, find sth, regard sth as, see sth as
Most people would consider such risks wholly unacceptable.

completely, quite, simply, totally, utterly, wholly | inherently
There is nothing inherently unacceptable in these proposals.

morally, politically, socially
socially unacceptable behaviour

to
Such a solution would be quite unacceptable to the majority of people.