absolutely necessary; vitally necessary; "essential tools and materials"; "funds essential to the completion of the project"; "an indispensable worker"
If you say that someone or something is indispensable, you mean that they are absolutely essential and other people or things cannot function without them. She was becoming indispensable to him. = essential dispensable. someone or something that is indispensable is so important or useful that it is impossible to manage without them = essential indispensable to
An indispensable resource for Russian language learners Highly useful and detailed grammatical information, extensive vocabulary and accompanying-necessary-information on usage as well as irregularities in form or usage (declensions or conjugations) Having compared many Russian and English dictionaries this is by far the most comprehensive resource you can get in a user-friendly and compact format at a reasonable price This is one of the best foreign language dictionaries I have used in my extensive foreign language studies The dictionary is touted as a first of its kind geared to American English rather than British I don't know how true this is, but as an American, I know it was useful to me either way This book eased my days as a student considerably I loved my old one so much I passed it on to a friend and got a new one last time I was in the States