Top: blade 刃 (sword 刀 with a mark 丶 for the blade), bottom: heart 心
The blade in the heart should be beared with endurance.

Left: water 氵, right: blade of a knife 刃 (here: drop 丶), stop 止 (imprint of right foot)
(Rost formation?) The drop of water that stopped (= remained) on the knife was tart (acid) and left a roughness.

Left: leather 韦 (Two layers 二 are separated with special sword 刀 to make leather.), right: blade of a sword 刃
Leather and blades should be resilient.

Sword 刀 with a mark 丶
The mark at the sword points to the blade.