The study of the interaction of biology and ancient language

(archaic) To shut away, confine, lock up. / (of a bird) To moult. / (of a bird, obsolete) To cause to moult. / (of a deer, obsolete) To shed antlers.

Third-person singular simple present indicative form of opacify

The characteristic of being pessimistic or contrarian. / Negative sentiment. / (physics) The characteristic of having a negative charge.