To place or bring into contact; to make adjacent or touching.
From Latin 'contiguus' (touching, adjacent) + '-ate' (verb suffix). The root 'contiguus' combines 'con-' (together) + 'tangere' (to touch), the same root as 'tangent' and 'tangible'.
This verb is practically obsolete now, but it's the missing link showing how 'tangent' (mathematical), 'tangible' (can be touched), and 'contiguous' (touching each other) all descend from the same Latin concept of touching!
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