dimmer

名词 dimmer:

1. a rheostat that varies the current through an electric light in order to control the level of illumination

形容词 dim:

1. lacking in light; not bright or harsh
   同义词：dim, subdued
2. lacking clarity or distinctness
   同义词：dim, faint, shadowy, vague, wispy
3. made dim or less bright
   同义词：dimmed, dim
4. offering little or no hope
   同义词：black, bleak, dim
5. slow to learn or understand; lacking intellectual acuity
   同义词：dense, dim, dull, dumb, obtuse, slow