1. (noun) a fragment of incombustible matter left after a wood or coal or charcoal fire

• cinder

2. (noun) a hard brick used as a paving stone

• clinker brick

1. (noun) a fragment of incombustible matter left after a wood or coal or charcoal fire

• fragment

2. (noun) a hard brick used as a paving stone

• brick

3. (verb) clear out the cinders and clinker from

• clean out
• clear out

4. (verb) turn to clinker or form clinker under excessive heat in burning

• change

1. (verb) turn to clinker or form clinker under excessive heat in burning

• cinder