words

capable--from capabilis (receptive) // capax (able to hold much) // capere (to take grasp, lay hold, catch, undertake, be large enough for, comprehend) // kap- (to grasp)

reciprocal--from reciprocus (returning the same way, alternating) // reco-proco- // recus- (backward) procus (forward)

reflection--from reflexionem (a reflection, a bending back) // reflex- // reflectere (back, to bend)

control--to check, verify, regulate; from contreroller (exert authority) // contrarotulus (a counter, register) // contra- (against) rotulus, rota (wheel, roll) from medieval method of checking accounts by duplicate register

should--from shall // sceal (I owe/he owes, will have to, ought to, must) // sculan // skal- or skul- (to owe, be under obligation) // scyld (guilt) // skeleti (to be guilty) // skilti (to get into debt)

passive--from passivus (capable of feeling or suffering) // pass- // pati (to suffer)

active--from act // actus (a doing) // acactum (a thing done) // agere (to do, set in motion, drive, urge, chase, stir up) // ag- (to drive, draw out or forth, move); ag-riculture