Antonyms of adj untrue

4 senses of untrue

Sense 1
untrue -- (not according with the facts; "unfortunately the statement was simply untrue")

INDIRECT (VIA false) -> true -- (consistent with fact or reality; not false; "the story is true"; "it is undesirable to believe a proposition when there is no ground whatever for supposing it true"- B. Russell; "the true meaning of the statement")

Sense 2
untrue -- (not true to an obligation or trust; "is untrue to his highest opportunity and duty"-Bruno Laske)

INDIRECT (VIA unfaithful) -> faithful -- (steadfast in affection or allegiance; "years of faithful service"; "faithful employees"; "we do not doubt that England has a faithful patriot in the Lord Chancellor")

Sense 3
out of true, untrue -- (not accurately fitted; not level; "the frame was out of true"; "off-level floors and untrue doors and windows")

INDIRECT (VIA uneven) -> even -- (being level or straight or regular and without variation as e.g. in shape or texture; or being in the same plane or at the same height as something else (i.e. even with); "an even application of varnish"; "an even floor"; "the road was not very even"; "the picture is even with the window")

Sense 4
false, untrue -- ((used especially of persons) not dependable in devotion or affection; unfaithful; "a false friend"; "when lovers prove untrue")

INDIRECT (VIA inconstant) -> constant -- (steadfast in purpose or devotion or affection; "a man constant in adherence to his ideals"; "a constant lover"; "constant as the northern star")

Similarity of adj untrue

4 senses of untrue

Sense 1
untrue -- (not according with the facts; "unfortunately the statement was simply untrue")
       => false (vs. true) -- (not in accordance with the fact or reality or actuality; "gave false testimony under oath"; "false tales of bravery")

Sense 2
untrue -- (not true to an obligation or trust; "is untrue to his highest opportunity and duty"-Bruno Laske)
       => unfaithful (vs. faithful) -- (not true to duty or obligation or promises; "an unfaithful lover")

Sense 3
out of true, untrue -- (not accurately fitted; not level; "the frame was out of true"; "off-level floors and untrue doors and windows")
       => uneven (vs. even) -- (not even or uniform as e.g. in shape or texture; "an uneven color"; "uneven ground"; "uneven margins"; "wood with an uneven grain")

Sense 4
false, untrue -- ((used especially of persons) not dependable in devotion or affection; unfaithful; "a false friend"; "when lovers prove untrue")
       => inconstant (vs. constant) -- (likely to change frequently often without apparent or cogent reason; variable; "inconstant affections"; "an inconstant lover"; "swear not by...the inconstant moon"- Shakespeare)