Proto-Indo-European Roots

Root/Stem: *lín-
Meanings:  flax, linen
Hellenic Greek linon 'flax'
Italic Latin línum 'flax'
Celtic Common Celtic *lín- >
Old Irish lín, Irish líon 'flax', léine 'shirt', Welsh llin 'flax', Cornish & Breton lien
Balkan Albanian li 'flax', gen. liri, Geg. linji
Germanic Common Germanic *línan >
Old High German & Middle High German & Middle Low German & Old Saxon & Old English & Old Norse lín 'flax', Gothic lein 'linen cloth'
Dutch lijn, German Leinen
Baltic Lithuanian linas 'linen cloth', pl. linai 'flax', Latvian lini (pl.) 'flax', Old Prussian linno 'flax'
Slavic Common Slavic *lïnü 'flax' >
Ukrainian & Bulgarian & Czech & Polish & Upper Sorbian len, Serbo-Croatian & Slovene & Lower Sorbian lan, Slovak l'an, Russian l'on 'flax'
Notes: A typical mild climate culture, flax was not cultivated by Asian Indo-Europeans, so the word is completely absent in Indo-Iranian, Armenian and Anatolian branches. Probably, the name of this plant was borrowed by Indo-Europeans coming to Europe fropm some aboriginal ethnic group.