uselessly is a form of:

Useless



adjective
1.
(Unserviceable, worthless, producing no results, vain) ដែលឥតប្រយោជន៍
Example: Feeling useless, it is useless to.
Example: A car is useless without petrol.
2.
(បច្ចេកទេស) ដែលឥតប្រយោជន៍
ENGLISH MEANING
adjective
1.
Having, or being of, no use; unserviceable; producing no good end; answering no valuable purpose; not advancing the end proposed; unprofitable; ineffectual; as, a useless garment; useless pity.
1.
abortive, empty, fruitless, idle, ineffectual, pointless, unavailing, valueless, vain, vapid, worthless
1.
effective, potent, profitable