坦白的，直率的（ frank的最高级 ）

frank \frank\ (fr[a^][ng]k), a. [Compar. {franker}
(fr[a^][ng]k"[~e]r); superl. {frankest}.] [F. franc free,
frank, L. Francus a Frank, fr. OHG. Franko the name of a
Germanic people on the Rhine, who afterward founded the
French monarchy; cf. AS. franca javelin, Icel. frakka. Cf.
{Franc}, {French}, a., {Franchise}, n.]
1. Unbounded by restrictions, limitations, etc.; free. [R.]
``It is of frank gift.'' --Spenser.

2. Free in uttering one's real sentiments; not reserved;
using no disguise; candid; ingenuous; as, a frank nature,
conversation, manner, etc.

3. Liberal; generous; profuse. [Obs.]

Frank of civilities that cost them nothing.
--L'Estrange.

4. Unrestrained; loose; licentious; -- used in a bad sense.
--Spenser.

Syn: Ingenuous; candid; artless; plain; open; unreserved;
undisguised; sincere. See {Candid}, {Ingenuous}.