The unfair favouring of one person or group at the expense of another.(noun)
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Use "favouritism" in a sentence
""Didn't hear what I said, did he?" muttered the lad, with an anxious look, for he had been growling at what he called the favouritism served out to some of the companies in choosing them to go out and have the first chance of being shot; and this, he told himself, was mutinous."
"Since I had left the general ward there were more opportunities for the officers to show kindness without being detected in "favouritism," and I had come to be on very good terms with several of them."
"BETTING BOX FIXED ODDS St George can regain title favouritism by bouncing back in"