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неразвитой adj. stresses
gen.	fallow (об уме, о человеке); undeveloped; vealy; puerile; rudimentary (intellectually); backward (mentally); cultureless; embryo; embryon; puisne; retarded
Gruzovik	intellectually backward; mentally retarded; immature; rudimentary; intellectually backward; mentally retarded
agric.	fallow (о человеке)
euph.	not very quick (о ребёнке)
Makarov.	inchoate
psychol.	uncultivated; unformed
неразвитый adj.
gen.	undeveloped; ignorant (Aly19); benighted; sparsely developed (Ivan Pisarev); little-developed (Ivan Pisarev); poorly developed (Ivan Pisarev); underdeveloped (Ivan Pisarev); under-developed (Ivan Pisarev); poor (например, об уровне техники A.Rezvov)
Gruzovik	intellectually backward (= неразвитой); mentally retarded (= неразвитой)
agrochem.	lithosolic
austral., slang	wet behind the ears
bot.	immature
geol.	juvenile
Gruzovik, obs.	immature (= неразвитой); intellectually backward (= неразвитой); mentally retarded (= неразвитой)
Makarov.	inelaborate; juvenile (об эрозии, о рельефе, о почве); uncultivated
math.	rudimentary
med.	primitive
Russian thesaurus
неразвитый adj.
obs.	неразвитой

неразвитой : 65 phrases in 26 subjects

Agriculture	5
Agrochemistry	6
American usage, not spelling	1
Animal husbandry	1
Biology	1
Botany	2
Chess	2
Ecology	1
Economics	1
Esoterics	1
General	15
Geology	2
Irish	1
Makarov	8
Microsoft	1
Military	1
Natural resourses and wildlife conservation	2
Navigation	1
Obsolete / dated	1
Programming	1
Psychiatry	2
Slang	4
Tibetan	1
Water resources	2
Welfare & Social Security	1
Winemaking	1