Ex-press, brysgenad, cenadwri; eglur, amlwg: mynegi, traethu
Ex-tant, yn bod; hanfodol
Ex-tend, estyn; hwyhau; helaethu
Ex-tent, helaethrwydd; hyd; estyn
Ex-tinct, diffoddedig: diffoddi; difa
Ex-tol, dyrchafu, mawrygu
Ex-tort, gwasgu, gorthrymu; mynu
Ex-tra, tra, rhy, tros ben
Ex-tract, erthynawd; crynodeb; tynu; gwasgu allan; crynhoi
Ex-treme, eithaf; pellder; diweddaf; dirfawr