צָפַן

From LSJ

δὶς ἐξαμαρτεῖν ταὐτὸν οὐκ ἀνδρὸς σοφοῦ → a wise man should not keep making the same mistake, a wise man should not repeat the same mistake, doing twice the same mistake is not a wise man's doing, making the same mistake twice does not befit the wise, making the same mistake twice does not belong to a man who is wise, making the same mistake twice does not belong to a wise man, the wise man does not make the same mistake twice, to commit the same sin twice is not a sign of a wise man, it is unwise to err twice

Source

English (Strong)

a primitive root; to hide (by covering over); by implication, to hoard or reserve; figuratively to deny; specifically (favorably) to protect, (unfavorably) to lurk: esteem, hide(-den one, self), lay up, lurk (be set) privily, (keep) secret(-ly, place).