'skillfully-executed' originates from the combination of 'skillfully' and 'executed'. 'Skillfully' comes from 'skill', which has roots in Old Norse 'skil', meaning 'discernment'. 'Executed' comes from Latin 'executus', the past participle of 'exsequi', meaning 'to follow out'.

'Skillfully' evolved from Middle English 'skilful', while 'executed' transformed from Middle English 'executen', eventually becoming the modern English 'executed'.

Initially, 'executed' meant 'to carry out', and 'skillfully' meant 'with skill'. Together, they evolved to mean 'performed with precision and expertise'.