Indispensable
Definition 1 of 1
Pro Tip 1/3
Non-substitutable
Use 'indispensable' when something can't be replaced because it's too important. A smartphone has become an indispensable device for modern communication.
Pro Tip 2/3
Vital Importance
'Indispensable' suggests that without the item or person, a task would fail or a goal couldn't be achieved. Her expertise in coding is indispensable to the success of the project.
Pro Tip 3/3
Often Overlooked
Sometimes, 'indispensable' items or skills are taken for granted, but are crucial in certain situations. In case of emergency, a flashlight is indispensable.