Pi`el Perfect weigh, test, prove (compare Arabic weigh, also Arabic & Aramaic derivatives); וְּאִזֵּן (conj.) Ecclesiastes 12:9 ("" חִקֵּר, תִּקֵּן).
אזן (√ of following; Biblical Hebrew אזן, מאֹזְנַיִם).
A primitive root (rather identical with 'azan through the idea of scales as if two ears); to weigh, i.e. (figuratively) ponder -- give good head.
see HEBREW 'azan
weigh, also Arabic & Aramaic derivatives); וְּאִזֵּן (conj.) Ecclesiastes 12:9 ("" חִקֵּר, תִּקֵּן). 
