mu (Greek letter)

(law) Kyūjitai form of 証人: witness

aquifer (an underground layer of water-bearing porous stone, earth, or gravel)

刀自: matron / 冬至: winter solstice / 当寺: / 当事: matter under concern / 当時: at that time / 杜氏: chief brewer at a sake brewery / 悼辞: funeral address / 湯治: taking the baths, going to hot springs