ଅର୍ଥ : The state of something that has outlived its relevance.
ସମକକ୍ଷ : non-issue
ଅର୍ଥ : Mail that can neither be delivered nor returned.
ସମକକ୍ଷ : dead mail
Dead letter ka meaning, vilom shabd, paryayvachi aur samanarthi shabd in Hindi. Dead letter ka matlab kya hota hai?