B1
a small piece of cloth or soft paper that you use to dry your eyes or nose
Dictionary examples:
He sneezed so hard, his handkerchief flew out the window like a bird. (0.0)
Tom used his handkerchief as a tiny superhero cape for his hamster. (0.0)
He waved his handkerchief to say goodbye, accidentally signaling a taxi instead. (0.0)
She dabbed her eyes with a handkerchief. (53.3)