To measure together or jointly; to compare by using the same measure or standard.
From 'co-' (together) plus 'measure,' from Latin 'mensura.' The verb form suggests the action of placing things side-by-side to determine their relative proportions.
To commeasure two things is to say 'I can hold these up side-by-side with the same ruler'—which seems obvious until you realize that time and space, or love and money, might be fundamentally impossible to commeasure.
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