недоразвит означава в английски

dwarfish▼(being especially small)
adjective
[UK: ˈdwɔː.fɪʃ] [US: ˈdwɔːr.fɪʃ]

immature▼(not fully formed)
adjective
[UK: ˌɪ.mə.ˈtjʊə(r)] [US: ˌɪ.mə.ˈtjʊr]

inchoate▼(not fully formed)
adjective
[UK: ɪnˈk.əʊɪt] [US: ɪnˈko.ʊɪt]