Answer: singly

AnswerCrossword Clue
SINGLYOne at a time
SINGLYOne by one
SINGLYWithout companions.
SINGLYIndividually.
SINGLYOne at a time.
SINGLYAlone
SINGLYNot en masse
singlyone at a time
singlywithout the company of others
singlysingle-handed
singlyseparately