Word | Noun | Adjective | Verb | Adverb |
---|---|---|---|---|
indispensable | No | Yes | No | No |
obligatory | No | Yes | No | No |
indispensable (adjective) | obligatory (adjective) |
---|---|
not to be dispensed with; essential | morally or legally constraining or binding |
absolutely necessary; vitally necessary | required by obligation or compulsion or convention |
unavoidable |