Ous is the standard Greek word for the ear, appearing 37 times across the NT with a striking split between literal and figurative uses. On the literal side, Peter cuts off the ear of the high priest's servant (Matt 26:51; Mark 14:47; Luke 22:50; John 18:10, 26), and Jesus heals it (Luke 22:51). On the figurative side, the refrain 'he who has ears to hear, let him hear' punctuates Jesus' parable discourse (Matt 11:15; 13:9, 43; Mark 4:9, 23) and recurs in Revelation's letters to the seven churches (Rev 2:7, 11, 17, 29; 3:6, 13, 22). Stephen's accusation that his hearers are 'uncircumcised in ears' (Acts 7:51) draws on the prophetic tradition of Isaiah 6:10, where God hardens the people's ears. The Spanish 'oidos' and German 'Ohr' track the literal sense, while context alone signals the metaphorical leap.