Lexical Definition

‎שָׁקַר‎ shâqar (shaw-kar') to deal H:V
a primitive root

fail, deal falsely, lie.

1) to do or deal falsely, be false, trick, cheat
1a) (Piel) to deal falsely
1b) (Qal) to deal falsely

See Greek: ἀδικέω · ἀθετέω · ἀποστρέφω · συκοφαντέω

Usage: 6 forms in 6 verses
Form Translated As     In Verse(s)
תִּשְׁקֹ֣ר you will deal falsely Gen.21.23
תְשַׁקְּר֖וּ you will deal falsely Lev.19.11
שִׁ֝קַּ֗רְנוּ we had dealt falsely Ps.44.17
יְשַׁקֵּ֖ר he will deal falsely 1Sam.15.29
יְשַׁקֵּ֑רוּ they will deal falsely Isa.63.8
אֲ֝שַׁקֵּ֗ר I will deal falsely Ps.89.33

Brown-Driver-Briggs

[‎שָׁקַר‎] verb denominative do or deal falsely; —

Qal Imperfect 2 masculine singular; ‎תִּשְׁקֹר‎ Gen 21:23 thou wilt not do falsely to me (‎׳‎‎לִ‎). Pi`el Perfect 1 plural ‎שִׁקַּ֫רְ נוּ‎ Ps 44:18* Imperfect 3 masculine singular ‎יְשַׁקֵּר‎ 1Sam 15:29 3 masculine plural ‎יְשַׁקֵּ֑רוּ‎ Isa 63:8, etc; — deal falsely 1Sam 15:29; Isa 63:8, with ‎ב‎ person Lev 19:11 (|| ‎כחשׁ‎); with ‎ב‎ of thing Ps 44:18*; Ps 89:34*.

‎שֹׁקֶת‎, ‎שִׁקֲתוֺת‎ see ‎שׁקה‎. ‎שֹׁר‎see ‎שׁרר‎. ‎שַׁרְאֶ֫צֶר‎ proper name, masculine see ‎שַׂרְאֶ֫צֶר‎

Brown-Driver-Briggs References

Book Refs
Genesis 21:23
Leviticus 19:11
1 Samuel 15:29
Psalms 44:18* · 89:34*
Isaiah 63:8