from appearances alone
"irrigation often produces bumper crops from apparently desert land"
"the child is seemingly healthy but the doctor is concerned"
"had been ostensibly frank as to his purpose while really concealing it"
"on the face of it the problem seems minor"
As it appears; apparently.
"The seemingly endless queue made everyone wonder how long they would have to wait."
In plain English: Seemingly means something appears to be true at first glance, even if it might not actually be that way.
"The road seemed quiet until we heard dogs barking in the distance, making us realize that it was actually full of noise all along due to our tired minds playing tricks on us."
Seemingly comes from Middle English semyngly, which was formed by adding the suffix -ly to the word seeming. The term entered English as an adverb meaning "in a way that appears true," reflecting its original sense of appearance rather than fact.