constant
common, familiar
Complaints about school food have become a familiar refrain.

sing, take up
The choir's sopranos took up the refrain.

echo, repeat
hear
I kept hearing the same refrain.

go
Can you remember how the refrain goes?

carefully, deliberately
He deliberately refrained from expressing his opinion on the matter.

wisely
barely
Priscilla could barely refrain from clapping her hands together.

from
I refrained from laughing.