弄り回す[ijirimawasu] to tinker with
どさ回りをやる[dosamawariwoyaru] to go on tour
螺子回し[nejimawashi] screwdriver
ウイック回転[uikkukaiten] Wick rotation
挨拶回り[aisatsumawari] courtesy call

一回[ikkai] once
ひと回り[hitomawari] one turn
一回忌[ikkaiki] first death anniversary
一回戦[ikkaisen] first game
一回分[ikkaibun] dose

愛想の良い[aisonoii] affable
意想外[isougai] unexpected
仮想[kasou] imagination
仮想記憶[kasoukioku] virtual memory
仮想空間[kasoukuukan] virtual space (e.g. in computer graphics)

回想[kaisou] reflection
回想録[kaisouroku] memoirs
楽想[gakusou] melodic subject
感想[kansou] impressions
危険思想[kikenshisou] dangerous thoughts