The Meaning of Gríma Wormtongue's Name

Dudes. It's as plain as day. I mean, now it is. In retrospect.

According to the Old English Word Hord, Gríma means mask. It also means spectre, ghost, and dread apparition! I mean, we knew he spoke with forkèd tongue, but this runs deeper. I sort of feel as chagrined as Théoden King for not realizing it sooner. Now I know. And you do too.