The story
- Proto-Germanic · inherited from*biþankijaną
- Old English · inherited frombeþenċan
- Middle English · inherited frombethenken
- English todaybethink
From Middle English bethenken, bithenchen (“to think about, consider”) from Old English beþenċan, biþenċan (“to think upon, remind, consider, remember”), from Proto-Germanic *biþankijaną; equivalent to be- + think. Akin to Old High German pidenchan (German bedenken), Gothic 𐌱𐌹𐌸𐌰𐌲𐌺𐌾𐌰𐌽 (biþagkjan), Dutch bedenken.
Etymology from Wiktionary, CC BY-SA 4.0.