quid pro quo
noun
[ ˌkwɪd prəʊ ˈkwəʊ ]
• a favour or advantage granted in return for something.
• "the pardon was a quid pro quo for their help in releasing hostages"
Similar:
exchange,
trade,
trade-off,
swap,
switch,
barter,
substitute,
substitution,
reciprocity,
reciprocation,
return,
payment,
remuneration,
amends,
compensation,
indemnity,
recompense,
restitution,
reparation,
satisfaction,
requital,
Origin:
mid 16th century (denoting a medicine substituted for another): Latin, ‘something for something’.