All adverbs

always
forever; throughout all time
 
wafer-thin
very thin
 
coterminously
in a coterminous manner
 
vitally
to a vital degree
 
loosely
structurally open and not compact or close
 
providentially
in a providential manner; as determined by providence
 
unattainably
in an unattainable manner or to an unattainable degree
 
ex officio
by virtue of position
 
still
to a greater degree or extent; used with comparisons
 
chromatically
with respect to color
 
trustfully
with trust; in a trusting manner
 
downhill
toward the bottom of a hill
 
crudely
in a crude or unrefined manner
 
awfully
in a terrible manner
 
childishly
in a childlike manner
 
regally
in a regal manner
 
uncertainly
in an unsteady manner
 
inconsistently
without showing consistency
 
puritanically
in a prudish manner
 
ravishingly
in a ravishing manner or to a ravishing degree
 
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