
schwierig
difficult
Not easy to manage, solve, or understand; requires effort or skill.
Das war eine wirklich schwierige Matheaufgabe.
That was a really difficult math problem.
difficult
Loading your saved state.

difficult
Not easy to manage, solve, or understand; requires effort or skill.
Das war eine wirklich schwierige Matheaufgabe.
That was a really difficult math problem.

difficult
Refers to a person who is hard to get along with because they are complicated, demanding, or moody.
Mein neuer Chef ist ein ziemlich schwieriger Mensch.
My new boss is quite a difficult person.

difficult
Describes a situation, condition, or period of time marked by problems, worries, or hardship.
Nach dem Jobverlust hatte er eine finanziell schwierige Zeit.
After losing his job, he had a financially difficult time.
The adjective 'schwierig' (difficult) belongs to the word family of 'die Schwierigkeit' (the difficulty; the problem, the obstacle). When something is schwierig, it causes difficulties.
Die größte Schwierigkeit war, alle Termine zu koordinieren.
The greatest difficulty was coordinating all the appointments.
'Schwierig' is very often used in the construction 'es ist schwierig, etwas zu tun' (it is difficult to do something). Here, 'es' introduces the sentence, and the infinitive with 'zu' describes the difficult action.
Es ist schwierig, ohne Vorkenntnisse einen Job zu finden.
It is difficult to find a job without prior knowledge.
If 'schwierig' describes a task, a problem, or a question, it means 'not easy.' If it refers to a person, it means that it is hard to get along with that person.
Die Prüfung war sehr schwierig.
The exam was very difficult.
To describe problematic phases of life or circumstances, 'schwierig' is often combined with nouns such as 'Zeiten' (times), 'Situation' (situation), or 'Lage' (position/situation).
Das Unternehmen befindet sich in einer finanziell schwierigen Lage.
The company is in a financially difficult situation.
heavy / difficult
When talking about tasks, schwer and schwierig can both mean that something is not easy to manage. Schwierig focuses especially on problems with understanding or solving something, while schwer can also emphasize the effort or strain required. The words are often interchangeable in this context, but they differ in this emphasis.

Die Aufgabe ist schwierig, weil mehrere Regeln gleichzeitig angewendet werden müssen.
The task is difficult because several rules have to be applied at the same time.
Die Aufgabe ist schwer, weil ihre Bearbeitung sehr viel Mühe verlangt.
The task is difficult because completing it requires a great deal of effort.