thereby
the·reby
adverb
1.
Origin
From Middle English therby, from Old English ðǣrbig, equivalent to there + by. Compare the parallel formation of German dabei.
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.