Latin word lignum comes from Ancient Greek λόγῳ, Ancient Greek ἀριθμός

Detailed word origin of lignum

Dictionary entry	Language	Definition
λόγῳ	Ancient Greek (grc)
ἀριθμός	Ancient Greek (grc)
logarithmus	New Latin (la-new)
*leǵ-	Proto-Indo-European (ine-pro)
*leǵ-no-	Proto-Indo-European (ine-pro)
lignum	Latin (lat)	(later Latin) wood tissue. Firewood. Tree.

Words with the same origin as lignum