The 4 cardinal directions are north (N), south (S), east (E) and west (W).
Intercardinal (or ordinal) directions (the 8 principal winds) are set solid:
northeast (NE) southwest (SW)
Bisecting the angles of the principal winds gives half-winds, named by the principal direction followed by the ordinal direction – the 2 parts joined with a hyphen:
east-southeast (ESE) north-northeast (NNE)