немислим означава в английски

inconceivable▼(unable to be conceived, unbelievable)
adjective
[UK: ˌɪnk.ən.ˈsiː.vəb.l̩] [US: ˌɪnk.ən.ˈsiː.vəb.l̩]

unthinkable▼(incapable of being believed; incredible)
adjective
[UK: ʌn.ˈθɪŋk.əb.l̩] [US: ʌn.ˈθɪŋk.əb.l̩]