like a duck takes to water
comfortably
in a walk
one-handed
with one hand tied behind one's back
at a canter
ungainfully
unimpulsive
natural
painless
spitelessly
effortlessly
unwincingly
unconditioned
brinkless
panglessly
easily
unshakenly
nonintensively
readily
unforced
effortless
unshaken
inexhaustedly
unconditionally
temptationless
windlessly
unresistedly
sedately
unsickly
instantaneously
undefrayed
unstumblingly
unconstrainted
one step at a time
unpushy
unweariedly
unarduous
unpained
unhinderedly
nondeviating
undreamingly
undifficult
unhinderable
unhesitantly
unconstrainable
unimpassive
untremblingly
unworriedly
undeflected