strengthen up
In real, traceable use. Part of the curated seed collection; community review is coming.
Meaning · English
To become or make (something) stronger, tougher or more durable.
Where it’s used:
Used
American English
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “strengthen up” mean?
To become or make (something) stronger, tougher or more durable.
Is “strengthen up” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.