1 عمومی:: عقب افتاده، بهپشت، ازپشت، عقب مانده، وارونه، كودن، به عقب
شبکه مترجمین ایران
2 عمومی:: پس سو
فرهنگستان
1 general:: In addition to the idiom beginning with BACKWARD, Also see BEND OVER BACKWARD; FALL OVER (BACKWARDS); KNOW LIKE A BOOK (BACKWARDS AND FORWARDS).
American Heritage Idioms
2 general:: adj. undeveloped: In 1930 China was a backward country. adv. to the rear: The man bent backward from his load. adv. to the rear: The car was going backward.
Simple Definitions
3 general:: adj. VERBS be, seem ADV. very | rather, somewhat a rather backward child | economically, educationally
Oxford Collocations Dictionary