meh₁-ns-tro-

“monthly measurement, lunar cycle”

Widely acceptedtimebody

menstrual, semester, menses

Instrumental of *meh₁- giving Latin mēnstruum, English menstrual, semester, menses.‌‌‌‌‍‌‌‍‍‌‍‌‍‌‌‌‌‍‌‌‍‌‍‍‍‍‍‍‍‍‍‍

(H)meyǵʰ-“to urinate, to mist”bʰardʰeh₂“beard, facial hair”bʰeh₁-tl-“instrument of speaking, lips”bʰelǵʰ-“to swell, to gird with a belt”bʰer-d-“to cut with a sharp edge, to shave”bʰer-mn̥-₂“something carried, a burden”bʰer-s-“top, point, bristling tip”bʰers-“to bristle, to stand on end”