Secret; hidden from general knowledge; undetected.
Related to the occult; pertaining to mysticism, magic, or astrology.
Esoteric.
To dissimulate, conceal, or obfuscate.
To cover or hide from view.
Supernatural affairs.
unvoiced; voiceless
Involving surds, or irrational numbers; not capable of being expressed in rational numbers.
An irrational number, especially one expressed using the √ symbol.
A voiceless consonant.