Pronunciation: [lˈɛt lˈuːs] (IPA) 
The phrase "let loose" consists of two syllables. The first syllable is pronounced /lɛt/ using the sound /ɛ/ as in Men. The second syllable is pronounced /luːs/ using the sound /uː/ as in Boot and /s/ as in Sam. The phrase means to release, to set free or to allow something to happen without restraint. Correct spelling of "let loose" requires the use of the letter "L," "E," "T," a space, "L," "O," "O," "S," and "E."
To "let loose" refers to the act of releasing or setting free something or someone, typically with a sense of abandon, energy, or unleashed force. This idiom can be used in both a literal and figurative sense.
In its literal meaning, "let loose" describes the action of allowing an object, such as an animal or a tightly held object, to be free or unrestrained. For example, a person might "let loose" their pet dog to wander or play in an open field. Similarly, a person may "let loose" a tightly wound rope or string to allow it to unravel.
Figuratively, "let loose" signifies the liberation of emotions, energy, or enthusiasm in a spontaneous or uninhibited manner. This can involve expressing oneself freely and passionately by releasing pent-up feelings or inhibitions. For instance, someone may "let loose" and dance wildly at a party or "let loose" their frustration by shouting or screaming.
"Let loose" can also indicate the release of hidden potential or unrestricted power. It suggests bringing forth one's full strength, might, or creativity after being held back or restrained. For example, an athlete may "let loose" their speed during a race or a musician may "let loose" their skills during a performance, exhibiting their true abilities without any limitations.
Overall, "let loose" implies a state of freedom, spontaneity, and unboundedness, whether it be physical, emotional, or metaphorical release.
The etymology of the phrase "let loose" can be traced back to Old English.
The word "let" in Old English was often used to mean "to allow" or "to permit". It evolved from the Proto-Germanic word "lētaną", which had the same meaning. In Middle English, "let" continued to be used in the same way, especially in legal and contractual contexts. Over time, it also took on the meaning of "to release" or "to set free".
The word "loose" in Old English was "los", stemming from the Proto-Germanic word "lausaz". It originally meant "free" or "unbound". In Middle English, it evolved to "loose" with the same meaning.
The phrase "let loose" emerged as a combination of these two words sometime in the 16th century.
