EN, EM
in, into
enter, entice, encumber, endemic, ensconce, enthrall, entreat, embellish, embezzle, embroil, empathy
EGO
self
ego, egoist, egocentric
ERR
wander
erratic, aberration, errant
EU
well, good
eulogy, euphemism, euphony, euphoria, eurythmics, euthanasia
EX, E
out, out of
exit, exacerbate, excerpt, excommunicate, exculpate, execrable, exhume, exonerate, exorbitant, exorcise, expatriate, expedient, expiate, expunge, expurgate, extenuate, extort, extremity, extricate, extrinsic, exult, evoke, evict, evince, elicit, egress, egregious