Q. úquétima, adj. “unspeakable, impossible to say or put into words, unpronounceable”

Reference ✧ WJ/370 ✧ “unspeakable, impossible to say, put into words, unpronounceable”

Related

Elements

ú- “no, not, un-, in-; hard, difficult, bad, uneasy”
quet- “to say, speak”
-ima “able to be done, -able, -ible”