My old blog, the Word of the Day, is defunct, and I’m getting ready to take it down. Before I do, though, I’m going to repost some of the best words here over the next few weeks. Enjoy!
Sacrifice comes from Latin sacrificium, meaning “sacred action” (from sacra, “sacred”, and ficium, “to do”). It was used to refer to the performance of any priestly duties. Since these duties almost always involved giving something to the gods, sacrifice came to mean, first, giving something up to Spirit, and then later (in the late 1500’s in English) giving something up in general.
As for sacra “sacred”, it derives ultimately from Proto Indo European sak, meaning “sanctify”; and it is the basis for consecrate, sacerdotal, saint, sanctum, sacrosanct, and sanctify.
Sacrifice’s primary syllable, sac, is identical with that ancient Proto Indo European root sak from 8,000 years ago. It indicates directed, balanced energy (”sa”) pouring into a container (”k”); metaphorically, then, the energy is the sacrifice, and Spirit is the container. The same phonosemantics work for the rather more mundane word sack.
Thanks to Erik for suggesting this word of the day.