1. is exists; is found.
2. is of, belongs to (gen.).
3. as auxiliary verb with pp.
4. atthi is frequently used (usually at the beginning of a clause), with sg. or pi. subject (even with 1 sg. or 2sg.), to mean: there is, there are; there exists; or with a following verb (so also santiy to mean: there is (exists)… who…; it is the case that….

atthi(n)²

mfn. (mfn., sg. nom. m. ~i) desirous; wanting something; having an aim.