Verb turn back has 4 senses
  1. backtrack, turn back, double back - retrace one's course; "The hikers got into a storm and had to turn back"
    --1 is one way to return, go back, get back, come back
    Sample sentences:
    Something ----s
    Somebody ----s
  2. revert, return, retrovert, regress, turn back - go back to a previous state; "We reverted to the old rules"
    --2 is one way to change by reversal, turn, reverse
    Sample sentences:
    Something ----s
    Somebody ----s
    Something is ----ing PP
    Somebody ----s PP
  3. chase away, drive out, turn back, drive away, dispel, drive off, run off - force to go away; used both with concrete and metaphoric meanings; "Drive away potential burglars"; "drive away bad thoughts"; "dispel doubts"; "The supermarket had to turn back many disappointed customers"
    --3 is one way to move, displace
    Sample sentences:
    Somebody ----s something
    Somebody ----s somebody
    Something ----s somebody
  4. check, turn back, arrest, stop, contain, hold back - hold back, as of a danger or an enemy; check the expansion or influence of; "Arrest the downward trend"; "Check the growth of communism in Sout East Asia"; "Contain the rebel movement"; "Turn back the tide of communism"
    --4 is one way to defend
    Sample sentences:
    Somebody ----s something
    Somebody ----s somebody
    Something ----s somebody
    Something ----s something
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