fathom
仭 centers on a unit of depth measurement: a fathom, the length of outstretched arms, used for measuring water depth or by extension, gauging something.
仭 combines 亻 (person) with 刄, a variant of 刃 (blade) with an added dot. The character likely relates to a person measuring with outstretched arms, the length of a fathom. The exact historical development of the 刄 component is uncertain.
A person 亻 using a blade-like measuring tool 刄 to gauge depth: imagine someone stretching their arms wide like a blade to measure a fathom.
For ジン, picture a person measuring the depth of a gin bottle with a fathom-long rope: gin -> ジン, and the person 亻 checks how deep the gin goes.