(just) say the word
used to tell someone that they have only to ask and you will do what they want

[TahlilGaran] Dictionary of Contemporary English ▲

say the word
(just) say the word
to tell someone that you want something.
If you want me to pick up some fish for dinner, just say the word.

You only have to say the word and I'll come and help you paint the kitchen.

if you tell someone that they only have to say the word and you will do something for them, you mean that you will do it immediately if they ask you.
You only have to say the word and I'll come and help.

Just say the word and the boys'll make sure he never gives you any more trouble.

[TahlilGaran] English Idioms Dictionary ▲

say the word
to give a sign, to show a wish
"Just say the word and I will come and meet you at the airport."

[TahlilGaran] English Idioms Dictionary ▲

say the word
v. phr., informal To say or show that you want something or agree to something; show a wish, willingness, or readiness; give a sign; say yes; say so.
Just say the word and I will lend you the money.
I will do anything you want; just say the word.
If you get tired of those pictures, say the word.

[TahlilGaran] English Idioms Dictionary ▲