Technical Definition of tafseer in Arabic

[muslima]

assalaamu 'alaikum,

I missed a word of the technical definition in Arabic. Could someone please post it here?

I have:

" 'Ilmun yufhamu bihi kitaabullahi al-munazzalu 'alaa nabiyyihee Muhammad

wa bayaani ma'aaneehi, wa isthikhraaji ______________

wa hukmihee"

Please fill in the blank,

jazakum Allah khair