The story
- Old English · inherited frommē
- Middle English · inherited fromme thinketh
- English todaymethinketh
From Middle English me thinketh, from Old English mē þynceþ; equivalent to me + thinketh, where me is the object pronoun.
Words from the same roots
Middle Englishme thinketh all →
methinks
Old Englishmē all →
myselfmeemethinks
Etymology from Wiktionary, CC BY-SA 4.0.