redundant
rih-DUN-duntadjMeaning unnecessary because it repeats something already there
Memory hook RE-DUN: done AGAIN, no need. The shop sign shouts, “FREE GIFT! NO CHARGE! COSTS NOTHING!” Saying the same thing three times is redundant.
“Free gift” is redundant, since every gift is free.
In context Once the town built a new bridge, the old ferry became redundant; there was no longer any need for a boat to carry people across.
Similar repetitive, unnecessary, superfluous
Opposite necessary, essential
From Latin redundare, “to overflow”: re- (again) + undare (to rise in waves).