Words, words, words

Let's start with one which would unfortunately apply to this blog:

desuetude \DESS-wih-tood\ noun

: discontinuance from use or exercise : disuse

lahar (LAH-har) noun

An avalanche-like mudflow composed of volcanic debris and water,
originating on the slopes of a volcano.

[From Javanese lahar (lava). Javanese is a language spoken on the island
of Java, Indonesia. It has about 80 million speakers.]

kith \KITH\ noun

: familiar friends, neighbors, or relatives

I have heard this word used only in conjunction with 'kin', as in 'kith and kin'