Proto-Germanic words from Proto-Indo-European
251 Proto-Germanic words with Proto-Indo-European in their history, whether borrowed directly or passed on through other languages (page 5).
*wītaną
Wiktionary has it from Proto-Indo-European *weyd- (“to see, to look”), with a shift of meaning from "to see" to "to witness" and then "to blame, to punish". Lehmann also traces it to this root.
*wīz
It is inherited from Proto-Indo-European *wéy (“we”), extended with the plural ending: Ringe derives it from *wéy-es, Kroonen from *ueies.
*wiþrą
It is inherited from Proto-Indo-European *wíterom, the adverbial accusative of *wíteros, from *wí "apart" and the comparative suffix *-teros. Kroonen reconstructs *h₁ui-tro-, a formation with the…
*wurdą
Wiktionary has it inherited from Proto-Indo-European *wr̥dʰom (“word”); Kroonen starts from *(h₂)urdʰ-o-, and Orel from *u̯ṛdho-.
*wurkijaną
It is inherited from Proto-Indo-European *wr̥ǵyéti (“(s)he works”), a present of the root *werǵ- "to work". Kroonen reconstructs the PIE present as *urǵ-ie- and calls it identical with the Young…
*þan
EWA equates it with inherited from Proto-Indo-European *tom, the accusative singular masculine of the PIE demonstrative *te/o-, which also gave Latin tum (“then”) and Avestan təm (“therefore”)…
*þankijaną
It is from Proto-Indo-European *teng- (“to think, to feel, to perceive”): Wiktionary starts from *tong-éye-ti, a causative of that root, and Ringe from a post-PIE *tong- "to perceive, to think"…
*þar
It is from Proto-Indo-European *to- (“that”), a pronominal stem, with a locative *-r; within Germanic, Wiktionary and Orel form it from *þa- "that" and the locative suffix.
*þeudō
It is inherited from Proto-Indo-European *tewtéh₂ (“tribe”): Ringe derives it from PIE *tewtáh2 "tribe, people" through *þeuþā́, Kroonen from *teut-éh₂-.
*þingą
Kroonen derives it from Proto-Indo-European *tenk- (“to be suitable”), from a preform *tenk-ó-, through the strong verb *þinhan- "to be suitable" (*þinhaną); Wiktionary has a PIE *tenkóm, likely…
*þurpą
It is from Proto-Indo-European *treb- (“building, dwelling”): Ringe sets up PIE *treb- ~ *tr̥b- "building", and Wiktionary *trab-, *treb- "room, dwelling, settlement".