The word 'infrequently-proven' is a compound adjective formed by combining 'infrequently' and 'proven'. 'Infrequently' originates from the Latin 'infrequens', meaning 'not frequent', and 'proven' comes from the Latin 'probare', meaning 'to test or prove'.

'Infrequently' evolved from the Latin 'infrequens' through Old French 'infrequent', while 'proven' evolved from the Latin 'probare' through Old French 'prover'.

Initially, 'infrequently' meant 'not often', and 'proven' meant 'tested or verified'. The compound adjective 'infrequently-proven' retains these meanings, indicating something rarely verified.