waro
1. (noun) deep hole, pit, abyss (due to natural causes), chasm, mine.
2. (noun) coal, charcoal.
Hari nui ana tana ngākau i te wā i whakaritea ia hei hoa mō tana tuakana ki te kōmiri waro, arā ki te panga i ngā kōwhatu aha noa ki waho (TWMNT 2/7/1873:75). / He was overjoyed at the time it was arranged that he accompany his older brother to sort coal, that is to throw out the stones and foreign matter.
3. (noun) carbon (C).
He pūmotu te waro, māna rawa e ora ai ngā momo rauropi katoa (RP 2009:436). / Carbon is an element and essential to all living things (RP 2009:436).