tar

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tar1 dark thick liquid distilled from wood or coal. OE. te(o)ru, corr. to MLG. ter(e) (LG. teer), MDu. tar, ter(re), ON. tjara :- Gmc. *terw-, gen. held to be f. *trew- TREE, the primary application having been to the black oily liquid produced by trees such as pines.
Hence tarry (-Y1) XVI.

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