请看:electric means “relating, pertaining, derived from, or producing electricity” and electrical means “involving or concerned with electricity”
electric and electricity are from Latin electrum and Greek elektron, “amber” as this phenomenon (electrostatic) was first noted when amber was rubbed
这是近义词辨析。
此外还有词根词源的讲解
这部词典还有形近词辨析,例如
complement is “to complete, round out” and compliment is “to praise or admire” and as a noun it is an expression of praise or admiration