loos / lose are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
loos: (noun) Austrian architect (1870-1933).
lose: (verb) fail to keep or to maintain; cease to have, either physically or in an abstract sense. (verb) fail to win. (verb) suffer the loss of a person through death or removal. (verb) miss from one's possessions; lose sight of. (verb) allow to go out of sight. (verb) fail to make money in a business; make a loss or fail to profit. (verb) fail to get or obtain.
loos: l·UW·z
lose: l·UW·z
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)