hum a tune

Translations
напевать мелодию
He likes to hum a tune while working.
Он любит напевать мелодию во время работы.
Definitions
To produce a melody or song by making a continuous sound with one's voice, typically without using words.
Words
hum

verb
напевать
a

article or possessive pronoun
один
tune

noun
мелодия