Effeithiol, a. effectual
Effeithiolaeth, n. effectuation
Effeithioldeb, n. efficaciousness
Effeithioli, v. to effectuate
Effro, a. agitated; awake
Effroad, n. rousing, waking
Effroi, v. to rouse; to wake
Effrom, a. haughty, stubborn
Eg, n. that is open; acre
Egalen, n. whetstone