The phrase "indispensable part" means something that is extremely important and necessary, and cannot be done without.
Sentences with «indispensible part»
He has been been an indispensible part of the French team since Laurent Blanc's arrival, tidying up in front of the back four with minimal fuss. (caughtoffside.com)
With that in mind, here are 6 best breast pumps for every day use that you may soon become an indispensible part of your life. (tinyfry.com)
I had to take the baby out and remove the sling to pass through security checkpoints, but other than that, the sling was an indispensible part of our travel. (breastfeedingtoday-llli.org)