to spend time relaxing or socializing with someone
誰かと一緒にリラックスしたり、社交したりして時間を過ごす (dareka to issho ni rirakkusu shitari, shakou shitari shite jikan o sugosu)
"I usually hang around with my old school friends at reunions."
"私は通常、同窓会で旧友たちと時間を過ごします。" (watashi wa tsuujou, dousoukai de kyuu yuu tachi to hang around with shimasu)
to do something faster
to start working smoothly after some time or preparation
to increase a country's holdings of foreign currencies
to invent or imagine new creative projects
to secretly hear someone’s conversation
to make major changes in an organization to improve it