Lexical Definition

‎קָהָה‎ qâhâh (kaw-haw') be blunt H:V
a primitive root

be set on edge, be blunt.

1) to be blunt, be dull
1a) (Qal) to be blunt, be dull
1b) (Piel) to be blunt

See Greek: ἐκπίπτω

Usage: 3 forms in 4 verses
Form Translated As     In Verse(s)
תִּקְהֶֽינָה they are blunt Ezek.18.2
they will be blunt Jer.31.29
תִּקְהֶ֥ינָה they will be blunt Jer.31.30
קֵהָ֣ה it is blunt Eccl.10.10

Brown-Driver-Briggs

[‎קָהָה‎] verb be blunt, dull (Late Hebrew id.; Aramaic ‎קְהָא‎, ); —

Qal Imperfect 3 feminine plural ‎תִּקְהֶינָה‎ Jer 31:29: Jer 30; Ezek 18:2 (all of teeth). Pi`el in sense of Qal: Perfect 3 masculine singular ‎קֵהָה‎ Eccl 10:10 if the iron be blunt.

Brown-Driver-Briggs References

Book Refs
Ecclesiastes 10:10
Jeremiah Chapter 30 · 31:29
Ezekiel 18:2