IPA: /ˈtæn.dʒənt/
KK: /ˈtændʒənt/
Not directly related or relevant; touching at a single point without crossing.
The discussion was tangent to the main topic, straying into unrelated areas.
A straight line or surface that touches another line or surface at one point without crossing it, or a sudden change in topic during a conversation.
During the meeting, she went off on a tangent about her vacation plans.
Tangent → It is formed from "tangere" (meaning to touch) and the suffix "-ent" (indicating an agent or something that performs an action). The word "tangent" refers to a line that touches a curve at a single point without crossing it, hence the meaning of touching.
Think of a line that 'touches' a curve at just one point — 'tangere' means to touch, and that's why a tangent is a line that touches a curve.