trustworthy Copy link Outline 1. lŏcuples, ētis (strictly, that can fulfil his engagements; hence of witnesses, etc., worthy of credence)2. fīdus (that may be depended on)3. grăvis (weighty, of worth4. certus • trustworthy: 1. lŏcuples, ētis (strictly, that can fulfil his engagements; hence of witnesses, etc., worthy of credence): most t. authorities, locupletissimi auctores, Cic. Div. 2, 58, 119: so, testis l., id. Off. 3, 2, 10. 2. fīdus (that may be depended on): a t. interpreter, f. interpres, Hor. A. P. 133: t. physicians, f. medici, id. Ep. 1, 8, 9: v. faithful. 3. grăvis (weighty, of worth: opp. levis, without weight, not t.): esp. in phr. gravis auctor, i. e. a voucher whose statement carries weight, Liv. 1, 16: for which also, auctor certus, bonus, luculentus, Cic. 4. certus: v. sure, certain.