contiguous

The word "contiguous" entered English in the early 17th century from the Latin contiguus, meaning "touching, bordering upon." This Latin term was derived from the verb contingere, a compound of con- (together) and tangere (to touch). The core concept of physical contact or adjacency is thus embedded directly in its roots. Over time, its meaning expanded from literal, physical touching to include more abstract forms of adjacency, such as events in a sequence or ideas in a logical chain, while retaining its fundamental sense of being in direct contact without interruption.

Structure: con (together) + tigu (touch) + ous (adjective suffix) - con: Latin origin, a prefix meaning "together, with". - tigu: A direct substring from the Latin root tangere (to touch), preserved in the English spelling. - ous: A suffix of Latin origin (-osus) used to form adjectives meaning "full of, characterized by".