niger-kordofanian: the family of languages that includes most of the languages spoken in Africa south of the Sahara; the majority of them are tonal languages but there are important exceptions (e.g., Swahili or Fula)
natural language: a human written or spoken language used by a community; opposed to e.g. a computer language
loft: (golf) the backward slant on the head of some golf clubs that is designed to drive the ball high in the air