Where does “口止め” come from?

口止め (Japanese) comes from Japanese 止め, from Japanese 連用形, from Japanese 見る, from Japanese 夢, from Old Japanese 夢, from Japanese 目, from Middle Chinese 目.

口止め (Japanese): keeping someone quiet; preventing from speaking; muzzling

Definitions

keeping someone quiet; preventing from speaking; muzzling

Ancestry of “口止め”, step by step

口止め traces back through two separate lines of ancestry.

via Japanese 止め

Step	Language	Word	Meaning
1	Japanese	止め	stopping
2	Japanese	連用形	an inflectional category: the continuative or...
3	Japanese	見る	to see, to watch, to observe, to look at...
4	Japanese	夢	a dream; a vision; leaving reality to the state...
5	Old Japanese	夢	a dream
6	Japanese	目	an order in biology: smaller than a class, bigger...
7	Middle Chinese	目	—

via Japanese 口

Step	Language	Word	Meaning
1	Japanese	口	mouth; opening; the mouth
2	Japanese	くち	mouth
3	Japanese	朽ちる	—

Every word from Middle Chinese 目 →Every word from Japanese 目 →Every word from Old Japanese 夢 →