sullen / dreary / gloomy / frowning / sulky

spot, dot / score, grade, mark(s) / point

key, important point / essential piece of something, requirement

the pin or rivet holding the spines of a folding fan together / (by extension) a pivot, cornerstone, keystone / a pin, often decorated, holding the handle to the tang of a katana

(archaic, possibly obsolete) the pin or rivet holding the spines of a folding fan together

(archaic, possibly obsolete) fortress, redoubt / (archaic, possibly obsolete) important point, key

need, necessity / essential

a female given name

to switch on and off; flash; blink; flicker

switching on and off; flashing; blinking; flickering