Re-flec-tion, gwrthdafliad; adfyfyriad
Re-flect-ive, adlewyrchol; adfyfyriol
Re-form-er, diwygiwr, adffurfiwr
Re-frac-tion, dadlewyrch; gwrthdoriad
Re-fract-ive, gwrthdoredigol
Re-fresh-ment, adfywiad, lluniaeth
Ref-u-gee, ymnoddwr, ymnoddiedydd
Re-fus-al, pall, gomeddiad
Re-gard-ful, ystyriol, gofalus
Re-gard-less, anystyriol, diofal