'echo-producing' is a modern English compound formed from the noun 'echo' and the verb 'produce'. 'echo' originates from Greek 'ēkhō' (ἠχώ), where it meant 'a sound or a repeated sound', and 'produce' originates from Latin 'producere', where 'pro-' meant 'forth' and 'ducere' meant 'to lead'.

'echo' entered English via Latin 'echo' from Greek 'ēkhō'; 'produce' developed from Latin 'producere' through Old French 'produire' into Middle English 'produce'. The adjectival compound 'echo-producing' is a straightforward modern English combination of these established roots.

Individually, 'echo' originally referred to a repeated sound and 'produce' meant 'to bring forth'; combined in modern usage they mean 'bringing forth echoes' or 'causing reverberation', a fairly literal extension of the original senses.