The compound adjective "time-intensive" is a modern formation following a productive English pattern, combining a noun with an adjective to describe a process that consumes a significant quantity of the specified resource. The first element, "time," descends from a common Germanic root related to the concept of a measured or fitting period. The second element, "intensive," originates from the Latin verb intendere, which carried the sense of stretching or straining, metaphorically extending to denote concentrated effort or application. The logic of the compound is transparent: an activity is "stretched" or "strained" in terms of the time required, making it demanding of that particular resource. This construction parallels other similar terms like "labor-intensive" or "capital-intensive," which describe processes heavily reliant on specific inputs.

Structure: time (noun) + intensive (adjective) - time: From Old English tīma, meaning "a period, a season, an era." Its functional role is as a noun root specifying the resource involved. - intensive: From Latin intensus, the past participle of intendere meaning "to stretch, strain, direct." In English, the suffix -ive forms adjectives meaning "having the nature of, tending to." Its functional role is as an adjective-forming suffix indicating a quality or tendency.