tangential
Meaning
Relating to or along a tangent
Only slightly or indirectly related to the main subject; peripheral
Structure
Usage
The discussion moved from the core issue to several tangential topics.
In geometry, a tangential line touches a circle at exactly one point.
His comment was interesting but largely tangential to the central argument.
Etymology
The word 'tangential' originates from the Latin verb tangere, meaning 'to touch'. This root gave rise to the mathematical term 'tangent', describing a line that merely touches a curve without intersecting it. The adjectival suffix '-ial' was added to form 'tangential', literally meaning 'of or relating to a tangent'. The modern figurative sense, meaning 'only slightly connected' or 'peripheral', derives logically from this geometric concept: just as a tangent only makes brief, superficial contact with a curve, a tangential remark only touches on the main subject in a passing, indirect manner.
Analysis
- tangent: From Latin tangent- (stem of tangens), present participle of tangere (to touch). In mathematics, a line that touches a curve at a single point. - ial: A suffix forming adjectives, from Latin -ialis, indicating 'relating to or characterized by'.