THACK

Etymology 1

Verb

thack (third-person singular simple present thacks, present participle thacking, simple past and past participle thacked)

(transitive) To strike; thump; thwack.

Etymology 2

Noun

thack (plural thacks)

A stroke; a thwack.

Etymology 3

Noun

thack (countable and uncountable, plural thacks)

the weatherproof outer layer of a roof, often thatch specifically

Verb

thack (third-person singular simple present thacks, present participle thacking, simple past and past participle thacked)

To cover a roof with thack.

Source: Wiktionary

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Thack, Thack"er.

Definition: See Thatch, Thatcher. [Obs. or Prov. Eng. & Scot.]

Source: Webster’s Unabridged Dictionary 1913 Edition

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