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slowly; sluggishly
渋滞でのろのろ運転を続けるしかなかった。
I had no choice but to keep driving slowly in traffic.
彼はのろのろ歩いていて全然進まない。
He's walking so slowly that he's not making progress.
亀がのろのろと道を横切っていた。
A turtle was slowly crossing the road.