שולחן ערוך יורה דעה · סימן כ״ט

English

There are eight types of terefot, and their signs are D"N (final), HN"K (initial), N (initial), P"Sh: attacked (derusah), perforated (nekuvah), missing (haserah), removed (netulah), torn (keruah), fallen (nefulah), severed (pesukah), and broken (sheburah).