look out for sb/sth

What is the origin of the idiom "look out for someone or something" and when to use it?

The origin of the idiom "look out for someone or something" can be traced back to the concept of vigilance and attentiveness. The phrase draws upon the idea of physically scanning one's surroundings and being watchful for potential dangers or opportunities. It reflects the instinctive behavior of humans and animals alike to actively observe their environment in order to safeguard themselves or others. It is commonly used in situations involving safety, such as warning someone of potential hazards or risks. Additionally, it is used in interpersonal relationships, indicating a sense of care and concern for someone's interests or welfare.