perfectly

Entry Definition
s/he makes it correctly by accident or by luck; makes it perfectly by skill alone (e.g., makes basket without using a form to shape it on)
s/he makes h/ correctly by accident or by luck; makes h/ perfectly by skill alone (e.g., makes bread without recipe)
the water is perfectly calm and smooth
it is known thoroughly or perfectly; it is known with certainty, is known to be true
s/he knows it thoroughly or perfectly; s/he knows it for certain, knows it to be true
(body of water) it is perfectly clear