"directest" in the adjective sense
1. direct
direct in spatial dimensions proceeding without deviation or interruption straight and short
"a direct route"
"a direct flight"
"a direct hit"
2. direct, unmediated
having no intervening persons, agents, conditions
"in direct sunlight"
"in direct contact with the voters"
"direct exposure to the disease"
"a direct link"
"the direct cause of the accident"
"direct vote"
3. direct
straightforward in means or manner or behavior or language or action
"a direct question"
"a direct response"
"a direct approach"
4. lineal, direct
in a straight unbroken line of descent from parent to child
"lineal ancestors"
"lineal heirs"
"a direct descendant of the king"
"direct heredity"
5. direct
moving from west to east on the celestial sphere or
6. direct
similar in nature or effect or relation to another quantity
"a term is in direct proportion to another term if it increases (or decreases) as the other increases (or decreases)"
7. direct
of a current) flowing in one direction only
"direct current"
8. direct
being an immediate result or consequence
"a direct result of the accident"
9. direct, verbatim
in precisely the same words used by a writer or speaker
"a direct quotation"
"repeated their dialog verbatim"
10. direct
lacking compromising or mitigating elements exact
"the direct opposite"
Source: WordNet® (An amazing lexical database of English)
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