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Italian word legno comes from Latin lego, Ancient Greek (to 1453) λόγῳ, Ancient Greek (to 1453) ἀριθμός, and later Latin lignum ((later Latin) wood tissue. Firewood. Tree.)
lego (Latin)
I collect, gather, bring together. I choose, select, appoint. I read.
λόγῳ (Ancient Greek)
ἀριθμός (Ancient Greek)
logarithmus (New Latin)
*leǵ- (Proto-Indo-European)
to collect, to speak, to leak
*leg-no (Proto-Indo-European)
lignum (Latin)
(later Latin) wood tissue. Firewood. Tree.
legno (Italian)
(plural) woodwind instrument. Sailing ship. Wood (the material, or a piece of wood).