indéfectible znamená v Angličtina

unwavering▼◼◼◼(always on course and steady)
adjective
[UK: ʌn.ˈweɪ.vər.ɪŋ] [US: ʌˈn.weɪ.vər.ɪŋ]

unswerving▼◼◼◼(not deviating)
adjective
[UK: ʌn.ˈswɜːv.ɪŋ] [US: ʌn.ˈswɝːv.ɪŋ]

grim [grimmer, grimmest]▼◼◻◻(rigid and unrelenting)
adjective
[UK: ɡrɪm] [US: ˈɡrɪm]