English: (noun) a type of hard rock used in blackening the teeth
Bahasa Malaysia: sejenis batu yang digunakan untuk menghitamkan gigi
Source: Peter Martin's Kelabit Dictionary
dadem: feverish, sick
nadem: to sharpen
ngadem: to blacken
penadem: something to sharpen with
sinadem (s-in-adem): was sharpened by
tadem: sharp, of a blade