Lexical Definition

‎אָזַן‎ ʼâzan (aw-zan') to ponder H:V
a primitive root (rather identical with ‎אָזַן‎ through the idea of scales as if two ears)

give good heed.

1) (Piel) weigh, test, prove, consider

Usage: 1 form in 1 verse
Form Translated As     In Verse(s)
וְאִזֵּ֣ן and he weighed Eccl.12.9

Brown-Driver-Briggs

Aramaic form: מֹאזֵן
II. [‎אָזַן‎] verb only Pi`el Perfect weigh, test, prove (compare Arabic weigh, also Arabic & Aramaic derivatives); ‎וְּאִזֵּן‎ (conj.) Eccl 12:9 (|| ‎חִקֵּר‎, ‎תִּקֵּן‎).

Brown-Driver-Briggs References

Book Refs
Ecclesiastes 12:9