This is an artificial word, an Aramaization of an obscure Hebrew usage (i.e. simply substituting taw> for shin. What is significant is that the targumist has rejected the normal interpretation of the MT as "pupil of the eye" common to LXX and Syriac and seems to reflect instead the unique qre vocalization in the MT for these consonants, i.e. understanding the Hebrew from the word אש "fire" rather than איש "man". Page refs. in other dictionaries: Jastrow: 133; Levy Ch-W: 1:77;