The story
- German · calque ofEinsehen“recognition, observation”
- English todayinsee
From in- + see, or taken as a back-formation of inseeing, itself a loan-translation / calque of German Einsehen (“recognition, observation”). Compare Old English onsēon (“to look on, observe, regard, take notice of”). More at insight.
Etymology from Wiktionary, CC BY-SA 4.0.