
professionell
professional
Refers to an activity that is done as a job and for pay, as opposed to a hobby.
Sie ist eine professionelle Tänzerin und tritt auf der ganzen Welt auf.
She is a professional dancer and performs all over the world.
professional
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professional
Refers to an activity that is done as a job and for pay, as opposed to a hobby.
Sie ist eine professionelle Tänzerin und tritt auf der ganzen Welt auf.
She is a professional dancer and performs all over the world.

professional
Describes a way of working that is very competent, objective, and high-quality.
Die Präsentation war äußerst professionell vorbereitet und durchgeführt.
The presentation was prepared and delivered extremely professionally.
'Professionell' (professional) belongs to the word family of 'der Profi' (the professional) and 'die Profession' (the profession/job). So it describes something that has to do with a profession or with high competence.
Er hat die Reparatur schnell und professionell erledigt.
He completed the repair quickly and professionally.
If 'professionell' (professional) refers to a person's status, the job-related meaning is intended. If it describes the quality of an action or result, it is about competence.
Er ist ein professioneller Fotograf.
He is a professional photographer.
The opposite is formed simply with the prefix 'un-': 'unprofessionell' (unprofessional). It describes behavior or work that does not meet the expected quality standards.
Es war unprofessionell, den Kunden so lange warten zu lassen.
It was unprofessional to keep the customer waiting so long.
To express high competence, 'professionell' (professional) is often combined with verbs such as 'arbeiten' (to work), 'handeln' (to act), or 'reagieren' (to react). Nouns such as 'Auftreten' (appearance/demeanor), 'Verhalten' (behavior), or 'Eindruck' (impression) are also typical.
Trotz des Stresses hat das Team sehr professionell gehandelt.
Despite the stress, the team acted very professionally.
professional / work-related
Beruflich shows that an activity is part of someone’s profession. Professionell can also refer to paid work as opposed to a hobby, but it can also simply describe a particularly competent way of working. Use beruflich when you want to clearly express a connection with someone’s profession; professionell is appropriate for the quality of the work.

Mara fotografiert nur als Hobby, arbeitet dabei aber sehr professionell.
Mara only takes photographs as a hobby, but she works very professionally.
Mara fotografiert beruflich und verdient damit ihren Lebensunterhalt.
Mara takes photographs professionally and earns her living from it.