Lexical Definition

‎שָׁלַשׁ‎ shâlash (shaw-lash') to do three ^H:V
a primitive root perhaps originally to intensify, i.e. treble; but apparently used only as denominative from ‎שָׁלוֹשׁ‎,

do the third time, (divide into, stay) three (days, -fold, parts, years old).

• to be (causatively, make) triplicate (by restoration, in portions, strands, days or years)

1) to do a third time, do three times, divide in three parts
1a) (Piel) to do a third time, divide into three parts
1b) (Pual) to be three years of age, be threefold

Brown-Driver-Briggs

I. [‎שִׁלֵּשׁ‎] Pi`el denominative do a third time, devide into three parts, etc.; — Perfect 2 masculine singular ‎וְשִׁלַּשְׁתָּ֫‎ Deut 19:3 divide land into three parts (so Imperfect ‎וַיְשַׁלֵּשׁ אֶתהָֿעָם‎ [for ᵑ0 ‎וַיְשַׁלַּח‎] 2Sam 18:2 ᵐ5<sup>L</sup> Bu); 1Sam 20:19 stay three days (compare Dr); v1Sam 20:20 We Dr and others (compare ᵐ5) read ‎׳‎‎אֲשַׁלֵּשׁ בַּ‎ (for ‎׳‎‎שְׁלשֶׁת הַ‎) = I will shoot on the third day with the arrows (HPS question); Imperfect 3 masculine plural ‎וַיְשַׁלֵּ֑שׁוּ‎ 1Kgs 18:34, and Imperative masculine plural ‎שַׁלֵּ֑שׁוּ‎ v1Kgs 18:34 do a third time. Pu`al Participle ‎מְשֻׁלָּשׁ‎ three years old Gen 15:9 + 1Sam 1:24 (read with ᵐ5 Th We etc. ‎בְּפַר מְשֻׁלָּשׁ‎ for ‎בְּפָרִם שְׁלשָׁה‎), feminine ‎מְשֻׁלֶּשֶׁת‎ Gen 15:9 (twice in verse); ‎הַחוּט הַמְשֻׁלָּשׁ‎ Eccl 4:12 the threefold cord; female plural ‎מְשֻׁלָּשׁוֺת‎ Ezek 42:6 three-storied chambers.

Brown-Driver-Briggs References