Proto-IE: *dow-
Meaning: for a long time
Avestan: dbōištǝm adj. `longissimum (zeitlich)'
Other Iranian: OPers duvaištam adv. `diutissime'
Armenian: tevem `dauere, halte aus, halte stand, bleibe', tev `Ausdauer, Dauer', itev `auf die Dauer, lange Zeit hindurch'
Old Greek: dǟ́n `lang' (dor. doā́n `lang'); dǟró- `lange dauernd'', adv. dǟthá `lange', daó- (~ -ā-) = `polükhrónios' (Hsch.)
Latin: dūdum `lange schon, längst'
Celtic: OIr doe `langsam'
Russ. meaning: долго
References: WP I 778 f
piet-prnum,piet-meaning,piet-avest,piet-iran,piet-arm,piet-greek,piet-slav,piet-lat,piet-celt,piet-rusmean,piet-refer,