Involving surds, or irrational numbers; not capable of being expressed in rational numbers.
unvoiced; voiceless
An irrational number, especially one expressed using the √ symbol.
A voiceless consonant.
Unhelpful, not useful; pointless (of an action).
Unable to do well at a particular task or thing. Useless is mildly insulting.
Without use or possibility to be used.
Good-for-nothing; not dependable.