Pronunciation: [lˈʊk ˈa͡ʊt] (IPA) 
"Look out" is a two-word phrase that people commonly use to alert someone of danger or warn them to pay attention. The first word, "look," is spelled with a silent "k" and pronounced as "lʊk." The second word, "out," is pronounced as "aʊt" and features a diphthong that combines the sounds of "ah" and "oo." Together, the phrase is pronounced as "lʊk aʊt" and has become a common idiom in the English language.
The term "look out" primarily functions as a phrasal verb with several different meanings depending on the context. It generally refers to the act of observing or scanning an area for potential dangers, risks, or opportunities. One of its common definitions is to be vigilant or watchful in order to prevent harm or accidents. This can involve actively searching for incoming threats, keeping an eye on someone or something to ensure safety, or warning others about potential hazards or problems they might not notice.
In addition to this primary meaning, "look out" can also be used informally to indicate detecting or noticing something. It implies being aware and attentive to one's surroundings or circumstances. For instance, if someone tells you to "look out for a blue car," they are instructing you to be on the lookout for a specific vehicle of that description.
Furthermore, "look out" can express concern, caution, or a sense of anticipation. It may be used as a warning to urge someone to remain cautious or to alert them of a forthcoming event or situation. Within this context, it often implies the need for alertness and attentiveness to avoid negative consequences.
Overall, "look out" encompasses the ideas of observation, vigilance, warning, anticipation, and attention. Its diverse meanings make it a versatile phrasal verb used in various contexts to convey a range of ideas related to monitoring, awareness, and safety.
A small watch-tower, or an elevation, on the roof of a bulding; a view; a prospect; watch.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The phrase "look out" originated from the Middle English term "loke outen", which combined "loke" (meaning "look" or "watch") and "outen" (meaning "outside" or "outward"). Over time, it evolved into "look out" and came to be used as a warning or an expression to alert someone to be vigilant or attentive for potential danger or something of interest.
