EXIGENT
Source: 566, 567
exigent. Exigent, n. a pressing business, occasion, end, writ
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Ex′i‐gent, a. [[L. exigens, -entis, p. pr. of exigere to drive out or forth, require, exact. See Exact.]] Exacting or requiring immediate aid or action; pressing; critical. “At this exigent moment.” Burke.