I. (adj.) nigra.

to make black, turn into black - nigrigar.
become / turn black - nigreskar.
to black polish - (shoes, etc.) cirajizar.
black and blue - (spot) livida.
black and blue spot - lividajo, livideyo; (med.) ekimoso.
deep black - nigrega.
to dye black - tintar nigre; nigrizar.
black art - nekromancio.
black pudding - sangosociso.

II. (n.)

put black on - nigrizar.

III. (v.)

to black the character of - denigrar.

IV. (adv.)

to look black at anyone - regardar desfavore (ulu).