Po-ly-syl-la-ble, amlsillawg, amlsill
Pre-cip-i-ta-tion, chwidrfrys, tafliad
Pre-des-ti-na-tion, rhagdrefniad
Pre-lim-i-na-ry, rhagammod; rhagsail; rhagammodol; rhagarweiniol
Pre-med-i-ta-tion, cynarfaethiad
Pre-par-a-to-ry, darpariadol
Prin-ci-pal-i-ty, tywysogaeth
Prob-a-bil-i-ty, tebygolrwydd
Pro-cras-ti-na-tion, addoediad, oediad
Pro-nun-ci-a-tion, aceniad; traethiad