lengthen

verbs

make longer

"Lengthen this skirt, please"

lengthen

antonym

is a type of (narrower)

make bigger or more

"The boss finally increased her salary"; "The university increased the number of students it admitted"

causes

become long or longer

"In Spring, the days lengthen"

become long or longer

"In Spring, the days lengthen"

lengthen

antonym

is a type of (narrower)

become larger, greater, or bigger; expand or gain

"The problem grew too large for me"; "Her business grew fast"