to give an inch
01
(always negative) to refuse to make even a slightest change to one's position, decision, etc.
例
During the negotiation, he would n't give an inch on the price.
to give somebody an inch
01
to treat someone in such a kind and generous manner that they become greedy and ungrateful to one
例
I let my coworker borrow my pen for a moment, and now they keep asking for more office supplies — give them an inch, and they'll ask for the whole stationery cabinet.



























