ebb : empower ::
a) divine
: dispel
b) loquacious
: taciturn
c) castigate
: reprove
d) influence
: instruct
e) confound
: baffle
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b) loquacious : taciturn
loquacious
means talkative and taciturn means terse or non talkative. so, they
are opposites and therefore are antonyms.