inedible means cannot be eaten
How about cannot be :
* Not a teacher
invisible, imperceptible, unseeable = cannot be seen
inaudible, imperceptible, silent = cannot be heard
There are more, but these seemed to be the ones that fit best. However, the choice depends on the context.
Last edited by SirGod; 04-Feb-2012 at 00:52.
- But the 'synonyms' aren't always exact. A taste, noise, smell, imperfection, roughness in an otherwise smooth surface... they can all be 'imperceptible', for example. It just means 'not available to the organs of perception.