דער־

From Middle High German der-, from Old High German ir-. Compare Bavarian der-, German er-, Vilamovian dyr-.

דער־‎ • (der-)

1. Inseparable verbal prefix that indicates a successful conclusion, leads to the wanted result.
2. Inseparable verbal prefix that indicates killing or dying.
3. Prefix signifying a notion of getting something by some means, usually through conscious effort.

   ‎דער־‎ (der-) + ‎דינען‎ (dinen, “to serve”) → ‎דערדינען‎ (derdinen, “to become/get as a result of service”)

From Polish do-, Belarusian да- (da-), Russian до- (do-), merged with the above Germanic prefix.

דער־‎ • (der-)

1. A prefix with the meaning "reaching the limit/barrier".