unslack

adj

unslack

adj

Etymology From un- + slack.

1

Rare Not slack.

[…] and only 27 percent of the unslack sample planes were clay.1961, American Institute of Mining, Metallurgical, and Petroleum Engineers, Papers and Discussions Presented Before the [Coal] Division, page 440:

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.