How do I delete a string pattern in a variable using a bash shell script?

shoebill

Usage is ${name/pattern}

See line 3.

declare -A MyBucketList
MyBucketList=([1]="The rain in Spain stays mainly on the plain" [2]="Go to Mars" [3]="Climb Mount Everest")
echo ${MyBucketList[3]/Mount}

Running the script gives the following results. The word Mount is deleted from the variable.

$ ./associative_array.sh
Climb Everest