blunt 'make less sharp' taper 'give a point to' point 'give a point to' dull 'make dull or blunt' sharpen 'make sharp or sharper' sharpen 'give a point to' blunt 'make dull or blunt'
Too much cutting dulls the knife's edge blunt the knives sharpen the knives The candles are tapered
Examples from VerbNet
The clothes dried wrinkled. The clothes dried. Bill dried the clothes with a hairdryer. The hairdryer dried the clothes. The cotton clothes dried easily. Bill dried the clothes.
Examples from SemCor
An African knife and battle-ax are at this moment being sharpened by McKinley and Green.