All adverbs

impracticably
to an impracticable degree
 
stirringly
in a stirring manner
 
primitively
in a primitive style or manner
 
cantankerously
in a bad mood
 
heartlessly
in a heartless manner
 
asexually
in an asexual manner
 
weakly
in a weak or feeble manner or to a minor degree
 
commensally
in a commensal manner
 
dichotomously
in a dichotomous manner
 
determinedly
with determination; in a determined manner
 
vitally
to a vital degree
 
chromatographically
by means of a chromatographic process
 
inconveniently
in an inconvenient manner
 
humanly
in the manner of human beings
 
submissively
in a servile manner
 
pertinently
in a pertinent way
 
chronically
in a slowly developing and long lasting manner
 
a posteriori
derived from observed facts
 
shakily
in an insecurely shaky manner
 
delusively
in a deceptive and unrealistic manner
 
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