(adj.) = imperative ; essential ; indispensable ; mission critical [mission-critical] ; driving. Ex: It is imperative that the indexer should have an appreciation of how the index is to be used. Ex: The preceding chapter has introduced the essential characteristics of bibliographic descriptions. Ex: Of course, these catalogs will still remain indispensable guides to LC holdings not represented by MARC records. Ex: Effectiveness is often measured as the resultant quality of mission critical products of the institution = A menudo la eficacia se mide como la calidad resultante de los productos esenciales de la institución. Ex: Self-actualization is the driving need to reach one's own potential. ---- * cuestión imprescindible = imperative. * hacer lo imprescindible = do + enough to get by. * lo imprescindible = bare necessities, the ; bare minimum. * ser imprescindible = be a must ; be a must ; be imperative.