
locker
relaxed
Relaxed, informal, and not formal in behavior or atmosphere.
Er hat eine sehr lockere Art und kommt mit jedem gut aus.
He has a very relaxed manner and gets along well with everyone.
loose / relaxed
Loading your saved state.

relaxed
Relaxed, informal, and not formal in behavior or atmosphere.
Er hat eine sehr lockere Art und kommt mit jedem gut aus.
He has a very relaxed manner and gets along well with everyone.

loose
Not firmly in place, not tight or tense.
Die Schraube ist locker, du musst sie wieder festziehen.
The screw is loose; you need to tighten it again.

easily
Colloquial for easy or effortlessly.
Die Matheaufgabe hat er locker in fünf Minuten gelöst.
He easily solved the math problem in five minutes.

light / fluffy
Having an airy consistency that is not dense or firm.
Der Kuchen ist schön locker und saftig geworden.
The cake turned out nicely light and moist.
The word 'locker' describes a state that is not firm, stiff, or tense. This idea appears in all meanings: with objects, in social situations, and also with tasks.
Nach der Massage fühlten sich meine Muskeln wieder ganz locker an.
After the massage, my muscles felt completely loose again.
In colloquial speech, 'locker' (easily) is often used as an adverb in the sense of 'easy' or 'effortlessly'. It emphasizes that a task or action was handled without much effort.
Den Marathon schafft er dieses Jahr locker unter vier Stunden.
He'll easily manage the marathon in under four hours this year.
In the sense of 'entspannt' (relaxed), 'locker' often describes people or the mood. Typical phrases are 'eine lockere Atmosphäre' (a relaxed atmosphere), 'ein lockeres Gespräch' (a casual conversation), or 'nimm es locker!' (take it easy!).
Auf der Party herrschte eine sehr lockere und freundliche Atmosphäre.
There was a very relaxed and friendly atmosphere at the party.
When something is physically not tight or firm, 'locker' (loose) is the right word. Common combinations are 'eine lockere Schraube' (a loose screw), 'ein lockerer Zahn' (a loose tooth), or 'lockere Kleidung' (loose clothing).
Mein kleiner Bruder hat seinen ersten lockeren Zahn.
My little brother has his first loose tooth.
To describe an airy and not firm consistency, 'locker' (light/fluffy/loose) is often used in cooking, baking, or gardening. Typical examples are 'lockerer Teig' (light/fluffy dough) or 'lockere Erde' (loose soil).
Für ein gutes Wachstum brauchen die Pflanzen lockere Erde.
For good growth, the plants need loose soil.
far / wide
Weit and locker can both describe clothing that is not tight. Weit emphasizes the cut or the amount of room, while locker describes how the garment sits on the body. Use weit for the shape and locker for the fit.

Die Jacke sitzt an den Schultern locker.
The jacket fits loosely at the shoulders.
Die Jacke ist an den Schultern weit geschnitten.
The jacket is cut wide at the shoulders.