From Wiktionary, the free dictionary
אונטער־ (unter-) + מאַנהעטן (manhetn).
אונטערמאַנהעטן • (untermanhetn) n
- Lower Manhattan
- Schaechter-Viswanath, Gitl, Glasser, Paul (2016) “Lower Manhattan”, in Comprehensive English-Yiddish Dictionary, Bloomington, Indiana: Indiana University Press, →ISBN