Answer:

purest

Answer	Crossword Clue
PUREST	Without contaminants
PUREST	Absolutely untainted
PUREST	Least tainted

PUREST	Most virtuous
PUREST	Most like driven snow
PUREST	Least spoiled
PUREST	Most pristine
PUREST	Most unspoiled
PUREST	Most homogeneous
PUREST	Least diluted
PUREST	"Of ... ray serene."

PUREST	Most perfect.
PUREST	Most unadulterated.
PUREST	Clearest.
PUREST	Having the least adulteration.
PUREST	Most absolute
PUREST	" . . . of ... ray serene"
PUREST	Least polluted
PUREST	Least sullied

PUREST	Most genuine
PUREST	" . . . a gem of ... ray serene": Gray
PUREST	Most faultless
PUREST	Least alloyed
PUREST	Most perfect
PUREST	Least affected
PUREST	Most unsullied
PUREST	Most theoretical

PUREST	Like 24K gold
PUREST	Least adulterated
PUREST	"The ... treasure mortal times afford is spotless reputation": Shakespeare
PUREST	Least contaminated