The Collaborative International Dictionary
Sparth
Sparth \Sparth\, n. [Cf. Icel. spar?a.] An Anglo-Saxon battle-ax, or halberd. [Obs.]
He hath a sparth of twenty pound of weight.
--Chaucer.
Wiktionary
sparth
n. (context obsolete English) A battle-axe or halberd.