▁the ▁same ▁word ; ▁ ▁and ▁the ▁list ▁of ▁proposed ▁IE ▁root - words ▁may ▁not ▁be ▁complete . ▁Reich enk ron ▁( 1 9 6 6 ) ▁assumed ▁that ▁so - called ▁" substr atum " ▁words ▁in ▁Roman ian ▁( th ose ▁whose ▁et ym ology ▁cannot ▁be ▁as cribed ▁to ▁any ▁of ▁the ▁fully ▁documented ▁languages ▁that ▁have ▁influenced ▁Roman ian : ▁Latin , ▁S lav ic , ▁Hung arian , ▁Greek , ▁Turkish ▁etc .) ▁are ▁of ▁Da cian ▁origin . ▁But ▁Pol om é ▁cons iders ▁that ▁such ▁a ▁method ology ▁is ▁not ▁reliable . ▁This ▁is ▁because ▁there ▁is ▁no ▁guarantee ▁that ▁the ▁substr atum ▁words ▁are , ▁in ▁fact , ▁Da cian . ▁Instead , ▁they ▁could ▁derive ▁from ▁other , ▁unknown ▁or ▁little - known ▁tong ues ▁at ▁some ▁period ▁current ▁in ▁D acia ▁or ▁Mo esia : ▁for ▁example , ▁possible ▁pre - Ind o - Europe an ▁language ( s ) ▁of ▁the ▁Car path ians . ▁ ▁Method ological ▁problems ▁▁ ▁The ▁method ology ▁used ▁by ▁Georg iev ▁and ▁Dur idan ov ▁has ▁been ▁question ed ▁on ▁a ▁number ▁of ▁grounds , ▁including : ▁ ▁The ▁ph on etic ▁systems ▁of ▁Da cian ▁and ▁Th ra cian ▁and ▁their ▁evolution ▁are ▁not ▁re construct ed ▁from ▁elements ▁derived ▁directly ▁from ▁the ▁ancient ▁languages ▁in ▁question ▁but ▁from ▁their ▁approxim ative ▁Greek ▁and ▁Latin ▁trans cript s . ▁ ▁For ▁example , ▁Greek ▁and ▁Latin ▁had ▁no ▁dedicated ▁graph ic ▁signs ▁for ▁ph