Meaning of TRUTH in English
■ noun ( plural ~s tru:δz , tru:θs ) the quality or state of being true.
↘(also the ~ ) that which is true as opposed to false.
↘a fact or belief that is accepted as true.
in ~ really; in fact.
to tell the ~ (or ~ to tell or if ~ be told ) to be frank.
OE trīewth , trēowth 'faithfulness, constancy' (see true , -th 2 ).
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004