Answer:

surds

Answer	Crossword Clue
SURDS	Voiceless sounds
SURDS	Irrational numbers
SURDS	Irrational numbers, in math

SURDS	Irrational numbers: Math.
SURDS	Irrational numbers.
SURDS	Voiceless speech sounds.
SURDS	Voiceless consonants.
SURDS	Certain numbers, in math.
SURDS	Certain speech sounds.
SURDS	Voiceless consonants

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.