olive
橄 centers on the olive tree and its fruit. The meaning is narrow and botanical, referring specifically to olives.
橄 combines 木 (tree) with 敢, which likely contributes the sound. The character was created to name the olive tree, a plant not native to East Asia.
The tree radical 木 beside 敢 suggests a specific kind of tree. Picture a daring (敢) tree that thrives in Mediterranean climates: the olive tree.
For カン, imagine a can of olives sitting under the olive tree: can -> カン, and the tree produces the fruit that fills the can.
—
Chinese white olive (Canarium album)