VERBS
be, feel, look
She looked comfortable sitting in her favorite armchair with a cup of tea.
make sth
Adding some cushions and soft lighting will make the old sofa more comfortable.
ADV
extremely, incredibly, superbly, very, wonderfully
After the long flight, I found the hotel bed incredibly comfortable and fell asleep immediately.
perfectly
enough, fairly, moderately, quite, reasonably
The old armchair wasn't fancy, but it was reasonably comfortable for reading.
surprisingly
VERBS
be, feel, look
The old armchair looks comfortable, so I always sit there to read.
become, get
After a few minutes in the warm bath, she finally became comfortable enough to relax.
make sb/yourself
The soft cushions and warm blankets made everyone comfortable during the long movie night.
ADV
very
completely, entirely, quite, totally
She felt quite comfortable speaking in front of the large audience after weeks of practice.
PREP
about
My parents weren't comfortable about me staying out late on school nights.
with
After working together for six months, she finally felt comfortable with the new team members.
VERBS
be
ADV
very
quite, relatively
She felt quite comfortable speaking English after living in London for two years.