I am looking for a word
Hi dear native speakers

I heard a word a few months ago but I can't remember it now.
The meaning of the word is sth like this: for example you want to go to a bank and your wife asks you to have lunch before leaving. But you say : I will go to a restsurant "on the way" going to the bank.

How do you say convey this idea? I am sure if I hear the word, I will immediately remember it😭 what is that word?

Thanks

Question

I am looking for a word
Hi dear native speakers

I heard a word a few months ago but I can't remember it now.
The meaning of the word is sth like this: for example you want to go to a bank and your wife asks you to have lunch before leaving. But you say : I will go to a restsurant "on the way" going to the bank.

How do you say convey this idea? I am sure if I hear the word, I will immediately remember it😭 what is that word?

Thanks

Answer

Could it be "en route"? It's a French word but it's used in English.

"I will go to the restaurant en route to the bank"

Answer

I will go to a restaurant on my way to the bank.

I will go to a restaurant while en route to the bank. 
"En route" is a French phrase, but we use it in English. Or one might say "in route."

I will go to a restaurant in transit to the bank.

I will go to a restaurant midway to the bank. 
Meaning "in the middle of the way" between the bank and your home.

These are the synonyms for "on the way" that I can think of. I hope it helps.

Answer

I will stop by the restaurant  "on my way"  to the bank.