Lengthen (verb)

1. To make something longer.
2. To increase the duration of something.

Origin:

From the word "length" meaning the extent of something from end to end, this word is used to refer to the action of making something longer or increasing its length.

Examples:

1. The tailor lengthened the dress by adding a few inches to the hem.
2. The architect lengthened the building by adding a new wing.
3. The company decided to lengthen the warranty period for their products.
4. He lengthened his workout routine by adding more cardio exercises.
5. The government lengthened the period of quarantine to prevent further spread of the virus.