dig in (your) heels

to refuse to change what you believe is right or what you want to happen.

Be firm on important issues, but do not dig in your heels at every opportunity.

• in broad strokes
• in cahoots
• in cahoots with
• in cahoots with someone
• in case
• in case of
• in case of something
• in charge
• in charge of
• in charge of something
• in check
• in chorus
• in close quarters
• in cold blood
• in concert
• in concert with
• in concert with someone
• in concert with something
• in conclusion
• in confidence
• in connection with
• in connection with something
• in corner
• in deep shit
• in demand