Quaer-o (quaesīt-), I seek [-quīro (-quīsīt-) in compounds]: query, acquire, inquisition, exquisite, quest and inquest (Fr.), question.
qualis, of what kind; quantus, how great: quality, quantity.
quăti-o, I shake; -cŭtio (-cuss-) in compounds: dis-cuss, quash (Fr.).
quŏtus, what number?: quota, quotidian (dies), quote and quotient (Fr.).
Rādix (rādīc-), root: radicle, eradicate, radish and radical (Fr.).
răpi-o (răpt-), carry off; răp-ax (răpāc-), grasping: rapac-ious, rapt, rapture; through Fr., rapine, ravine, rapid, ravishing, ravenous.
rĕg-o (rect-), regn-o, I rule, direct; rex, king; rēgula, a rule; rĕg-io, district: reg-ent, regnant, regi-men, cor-rig-ible, rector, rectitude, di-rect, rectangle, regal, regalia, regular, region; through Fr., regime, regiment, reign, rectify, dress (Lat. di-rect-), rule (Lat. rēgula).
rēs, thing: through Fr., real, realty, realize, republic; rebus.
rīd-ere (rīs-), to laugh: de-ride, derision, ridi-cule and ris-ible (Fr.).
rīpa, river bank: riparian, river (Fr. rivière), ar-rive (Fr.).