1. Conditional antagonism
plain sailing, smooth sailing, straight sailing; mere child's play, holiday task; cinch [U.S.].
smooth water, fair wind; smooth royal road; clear coast, clear stage; tabula rasa; full play (freedom) [more].
disencumbrance, disentanglement; deoppilation; permission [more].
flow with the stream, swim with the stream, drift with the stream, go with the stream, flow with the tide, drift with the tide; see one's way; have all one's own way, have the game in one's own hands; walk over the course, win at a canter; make light of, make nothing of, make no bones of.
be at home in (skillful) [more].
render easy; facilitate, smooth, ease; popularize; lighten, lighten the labor; free, clear; disencumber, disembarrass, disentangle, disengage; deobstruct, unclog, extricate, unravel; untie the knot, cut the knot; disburden, unload, exonerate, emancipate, free from, deoppilate; humor (aid) [more]; lubricate [more]; relieve [more].
leave a hole to creep out of, leave a loophole, leave the matter open; give the reins to, give full play, give full swing; make way for; open the door to, open the way, prepare the ground, smooth the ground, clear the ground, open the way, open the path, open the road; pave the way, bridge over; permit [more].
[Adjectives] easy, facile; feasible (practicable) [more]; easily managed, easily accomplished; within reach, accessible, easy of access, for the million, open to.
unembarrassed, disburdened, unburdened, disencumbered, unencumbered, disembarrassed; exonerated; unloaded, unobstructed, untrammeled; unrestrained (free) [more]; at ease, light.
at home; quite at home; in one's element, in smooth water.
[Phrases] touch and go. [more]