key to
verb
keyed to; keying to; keys to
chiefly US
1
: to make (something) suitable for (a particular use or type of person)
—often used as (be) keyed to
I try to key my lectures to my audience.
The educational program is keyed to the needs of working women.
2
: to change (something) in a way that is closely related to (something else)
—usually used as (be) keyed to
The amount of money they receive is keyed to the rate of inflation.
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Merriam-Webster unabridged



