assiduous

داراى پشتکار،ساعى ،مواظب

Etymology: Latin assidu-us, participle from assid-ere "to sit by or at something" < ad- "to" + sedere "to sit." The same PIE root developed into English "sit," "set," "saddle," and "seat," Russian sest' "sit," sed-lo "saddle," and the "-šad" in Sanskrit "upanishad" from upanisad with -sad "sitting."kušâ
pay-gir
por-kâr

tekun

gorliwy

[ъ'sidjuъs] а усърден, старателен, прилежен.