Collocations for unable - adj.

appear, be, feel, prove, seem
become
remain
find yourself, leave sb, make sb, render sb
She found herself unable to meet his gaze.
The accident left him unable to walk.

consider sb/sth
He was considered unable to cope with the pressure of the job.

completely, quite, totally, utterly, wholly
increasingly
almost, nearly, virtually
generally, largely
apparently, seemingly
He went on, apparently unable to stop.

clearly
simply
The staff were simply unable to cope.

somehow
They are somehow unable to make the choices necessary.

genuinely (esp. BrE)
temporarily
Clare nodded, temporarily unable to speak.

still
currently
constitutionally, physically
He seemed constitutionally unable to keep quiet.

unwilling or unable
He remained silent, unwilling or unable to say what was in his mind.