πειράω: imperfect middle 3 person (singular and plural), 
ἐπειρᾶτο, 
ἐπειρῶντο; perfect passive participle 
πεπειραμενος (see below); common in Greek writings from 
Homer down; 
to try; i. e.: 
1. to make a trial, to attempt (
A. V. to assay), followed by an infinitive; often so from 
Homer down; also so in the middle in 
Acts 9:26 R G; 
Acts 26:21 (
Xenophon, symp. 4, 7; Cyril 1, 4, 5, etc.; often in 
Polybius; 
Aelian v. h. I, 34; 2 Macc. 2:23; 3Macc. 1:25; 4 Macc. 12:2, etc.); hence, 
πεπειραμενος taught by trial, experienced, Hebrews 4:15 in certain manuscripts and editions ((
Rec.st), 
Tdf. formerly) (see below, and cf. 
πειράζω, d. 
α.). 
2. In post-
Homer usage with the accusative of a person 
to test, make trial of one, put him to the proof: his mind, sentiments, temper, 
Plutarch, Brut. 10; in particular, to attempt to induce one to commit some (especially a carnal) crime; cf. 
Passow, under the word, 3{a}; (Liddell and Scott, under the word, A. IV. 2). Hence, 
πεπειραμενος in 
Hebrews 4:15 (see 1 above) is explained by some (cf. 
Winer's Grammar, § 15. Note at the end) tempted to sin; but the passive in this sense is not found in Greek writings; see Delitzsch at the passage. 
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