All phrasal verbs
around
/əraʊnd/7 verbsVowel-initial — links backwardsMovement with no fixed destination, or a turn to face the other way.
AROUND adds a strong flavour of purposelessness: hang around, mess around, fool around. Compare look for (targeted) with look around (browsing).
Its other sense is rotation or reversal — turn around, come around — including the figurative reversal of an opinion.
What it does to the sound
Like AWAY, it starts on an unstressed schwa and takes the main stress on its second syllable: a-ROUND. The verb links straight in, so hang around is one four-syllable run.
What AROUND means
Aimlessness — no particular purpose
The activity has no goal, and that is the point.
Rotation — turn to face the other way
A physical or figurative reversal.
Every verb that takes AROUND
The complete list — 7 of them. The section above groups the common ones by what AROUND is doing.