'arborization' originates from Latin, specifically the word 'arbor' where 'arbor' meant 'tree', combined with the verb-forming suffix '-ize' and the noun-forming suffix '-ation' (via modern/Scientific English and French formations).

'arbor' (Latin) contributed the root meaning 'tree'; from this root the verb-like formation (e.g. French/Modern Latin 'arborizare' or English 'arborize') produced terms meaning 'to make tree-like', and the noun form 'arborization' developed in scientific English to denote the process or pattern of branching.

Initially it meant 'to make tree-like' (i.e., cause to have tree-like branches), but over time it evolved into the current noun sense referring to the process or pattern of forming tree-like branches ('the branching itself').