IPA: /ˈtiːmɪŋli/
KK: /ˈtimɪŋli/
In a way that suggests something is true, but may not be; apparently or seemingly true.
The project was seemingly successful, but there were hidden issues.
Teemingly is derived from "teem" (from Old English "tēman", meaning to produce or bring forth) and the suffix "-ly" (meaning in a manner of). The word "teemingly" means in a manner that produces or brings forth, often used to describe something that appears to be abundant or overflowing.
Think of 'teem' as bringing forth or producing, and remember that 'teemingly' describes something that appears to be overflowing or abundant.