Ex-qui-site, rhagorol, godidog; dewisedig; manwl, perffaith
Ex-ten-sion, ystyniad; eangiad, helaethiad
Ex-ten-sive, helaeth, eang; mawr
Ex-tin-guish, diffoddi, diffodd; dilëu
Ex-tir-pate, diwreiddio, dinystrio; symmud
Ex-tor-tion, cribddail, treisiad; gorthrwm
Ex-trac-tion, tyniad, tyniad allan, llinach
Ex-treme-ly, yn eithaf; dros ben; yn aruthr
Ex-tri-cate, rhyddhau, dadrysu; dadblygu
Ex-trin-sic, allanol; ammhriodol