to change repeatedly in size, amount, quality, etc. from one extreme to another
نوسان کردن, بالا و پایین رفتن, تغییر مداوم داشتن
adjective
1
changing repeatedly in size, amount, quality, etc. from one extreme to another
نوسان, تغییر مداوم, افتوخیز, بیثبات
noun
1
a toy that consists of two round pieces of plastic or wood joined together, with a piece of string wound between them. You put one end of the string around your finger and make the yo-yo go up and down.