墨 - black ink, India ink, ink stick

certificate; certified document; authorization; authorisation

sumi; India ink; Chinese ink; ink stick; ink-cake

ink painting

India-ink painting

tattoo (esp. a traditional Japanese one); tattooing

Mexico

soot on the bottom of a pot or pan

ink painting style

vermillion stick; red ink

cuttlefish; squid

centre line (usu. in buildings, joinery, etc.); center line

resuming writing after adding more ink to one's brush