unslack

English

Etymology

From un- +‎ slack.

Adjective

unslack (comparative more unslack, superlative most unslack)

  1. (rare) Not slack.
    • 1961, American Institute of Mining, Metallurgical, and Petroleum Engineers, Papers and Discussions Presented Before the [Coal] Division, page 440:
      […] and only 27 percent of the unslack sample planes were clay.
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