Definition of sustain

The word "sustain" comes from the Latin verb "sustinere," which literally translates to "hold under" or "support." In Middle English, the word was spelled "sustene," and it referred primarily to providing support or assistance to someone in need. By the 14th century, "sustain" had taken on a wider meaning, referring to something that was maintained or kept up over time. In the 16th and 17th centuries, "sustain" began to be used more frequently in the context of environment and resources. It came to be associated with the idea of using resources in a way that allowed them to continue to be used over time, without depletion or damage. This usage gained momentum in the 20th century, as concerns about environmental sustainability and conservation grew. Today, "sustain" and its related verb "sustainable" are commonly used to refer to practices that promote environmental and social responsibility, and that aim to ensure that resources are used in a way that supports long-term viability and well-being.