Fujian province, river, tribe
閩 centers on a specific Chinese province (Fujian), historically associated with a river and a local tribe. The meanings are tied to that place rather than a single abstract concept.
閩 combines 門 (gate) with 虫 (insect/snake). The exact historical origin is uncertain, but it is traditionally associated with the name of a region and its people, possibly referencing local fauna or a tribal emblem.
Picture a gate 門 with a distinctive local insect 虫 inside, representing the unique character of Fujian province and its river tribe.
For ベン, imagine a bent gate 門 with a bug 虫 inside, marking the entrance to Fujian: bent -> ベン.