Lexical Definition

‎יְשִׁימַה‎ yᵉshîymah (yesh-ee-maw') desolation H:N-F
from ‎יָשַׁם‎

let death seize (from the margin).

1) desolation

Brown-Driver-Briggs

[‎יְשִׁימָה‎] noun feminine desolation, only intensive plural ‎יְשִׁימוֺת‎ Ps 55:16* Kt (Qr ‎יַשִּׁיא מָוֶת‎), so Ges Hup and others, compare proper name, of a location ‎בית הישׁימות‎ above; ᵐ5 Ew Ol Pe De Bae and others follow Qr, let death come deceitfully upon them, see ‎נשׁא‎.

Brown-Driver-Briggs References

Book Refs
Psalms 55:16*