lengthens

Makes more protracted

Lengthens means makes or becomes longer.

A tailor lengthens a hem by letting it out.

Days lengthen as summer approaches.

The afternoon shadows lengthened across the lawn.

To lengthen can also mean to extend in duration: Budget cuts lengthened wait times at the clinic.

physical

stretches

Extends or lengthens

pulls · reaches · strains · unfurls · expands · spreads · widens · broadens · uncoils · straightens

duration

prolongs

Extends the duration

sustaining · perpetuation · continuance · preservation · maintenance · lingering · dragging · retention · persistence · endurance

tailoring

lets out

Permits to leave

modifies · extends · splices · pieces · inserts · supplements

growth

develops

Comes into being gradually

thickens · advances · progresses · evolves · increases · amplifies · augments · enhances · escalates · intensifies

Opposites
duration/temporal extent

lengthensshortens

Reduces in length

curtails · abbreviates · cuts short · truncates · contracts

Phrases
Family

lengthen, lengthened, lengthening

Familiarity
Top 50,000
Profile
Known to kids · Used worldwide · Timeless · Everyday, not technical · Rated G