Adjective primal has 2 senses
  1. cardinal, central, fundamental, key, primal - serving as an essential component; "a cardinal rule"; "the central cause of the problem"; "an example that was fundamental to the argument"; "computers are fundamental to modern industrial structure"
    Antonym: unimportant (indirect, via important)
  2. aboriginal, primal, primeval, primaeval, primordial - having existed from the beginning; in an earliest or original stage or state; "aboriginal forests"; "primal eras before the appearance of life on earth"; "the forest primeval"; "primordial matter"; "primordial forms of life"
    Antonym: middle (indirect, via late, early)
    Antonym: late (indirect, via early, middle)
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