absolutely required and not to be used up or sacrificed
absolutely necessary; vitally necessary; "essential tools and materials"; "funds essential to the completion of the project"; "an indispensable worker"
being or relating to or containing the essence of a plant etc; "essential oil"
knowing and perceiving; having awareness of surroundings and sensations and thoughts; "remained conscious during the operation"; "conscious of his faults"; "became conscious that he was being followed"
intentionally conceived; "a conscious effort to speak more slowly"; "a conscious policy"
the act of communicating with a deity (especially as a petition or in adoration or contrition or thanksgiving); "the priest sank to his knees in prayer"
the discipline that records and interprets past events involving human beings; "he teaches Medieval history"; "history takes the long view"
all that is remembered of the past as preserved in writing; a body of knowledge; "the dawn of recorded history"; "from the beginning of history"
a record or narrative description of past events; "a history of France"; "he gave an inaccurate account of the plot to kill the president"; "the story of exposure to lead"
the aggregate of past events; "a critical time in the school's history"
the continuum of events occurring in succession leading from the past to the present and even into the future; "all of human history"
the end of a word (a suffix or inflectional ending or final morpheme); "I don't like words that have -ism as an ending"
event whose occurrence ends something; "his death marked the ending of an era"; "when these final episodes are broadcast it will be the finish of the show"