IPA: /ˈsiːmɪŋli/
KK: /ˈsimɪŋli/
In a way that appears to be true but may not be; apparently.
She was seemingly happy, but I could tell she was upset inside.
Seemingly → It is formed from "seem" (from Old English *seman*, meaning to appear or to be perceived) and "-ingly" (a suffix used to form adverbs indicating manner). The word "seemingly" means in a manner that appears to be true or real, but may not actually be so.
Think of how something 'appears' ('seem') and the '-ingly' shows how it is done. This helps you remember that 'seemingly' refers to how something appears to be.