balk

nouns

the area on a billiard table behind the balkline
"a player with ball in hand must play from the balk"
balk, baulk
something immaterial that interferes with or delays action or progress
balk, baulk, check, deterrent, handicap, hinderance, hindrance, impediment
one of several parallel sloping beams that support a roof
balk, baulk, rafter
an illegal pitching motion while runners are on base
balk
is derived from
balky
is a type of (narrower)
(baseball) the act of throwing a baseball by a pitcher to a batter
delivery, pitch

verbs

refuse to comply
balk, baulk, jib, resist
is derived from
balker