ଅର୍ଥ : Become less tense, less formal, or less restrained, and assume a friendlier manner.
ଉଦାହରଣ :
Our new colleague relaxed when he saw that we were a friendly group.
ସମକକ୍ଷ : relax
Loosen up ka meaning, vilom shabd, paryayvachi aur samanarthi shabd in Marathi. Loosen up ka matlab kya hota hai?