lengthen

英 ['leŋθ(ə)n; -ŋkθ-] 美['lɛŋθən]

The lengthening path to adulthood appears exacerbated (恶化) by parental involvement in the college years.

Conventional wisdom would seem to suggest that companies have no incentive to lengthen the life cycle of their products and reduce the revenue they would get from selling new goods.