the word 'unborn' is a straightforward compound formed within old english from the native prefix 'un-' and the past participle 'born'. the prefix 'un-', deriving from proto-germanic un-, is a prolific negator, akin to latin 'in-' and greek 'a-'. 'born' originates from the old english 'boren', the past participle of 'beran' (to carry, bear), which traces back to the proto-indo-European root bher- (to carry). thus, the literal construction "not carried [to term]" or "not borne" logically yields the modern abstract meaning of 'not yet born', describing a fetus or a future generation.

Structure: un (not) + born (given birth to) un- (old english, a prefix meaning 'not'); born (old english, past participle of 'beran' meaning 'to bear, to carry')