Streng vs. strikt vs. hart
The German words streng, strikt, and hart all relate to the concept of being strict or severe, but they are used in different contexts. The word streng focuses on discipline and authority, strikt emphasizes absolute rigidity and a lack of exceptions, and hart conveys harshness, toughness, or a lack of mercy.
Streng
The word streng is the most common translation for strict, stern, or severe. It implies a firm demand for discipline and obedience. It is frequently used to describe authority figures like parents and teachers, as well as rules or guidelines, often carrying an educational or moral undertone.
Mein Vater war sehr streng, aber immer fair.
(My father was very strict, but always fair.)
In dieser Schule gelten strenge Regeln.
(Strict rules apply in this school.)
Der Lehrer hat uns einen strengen Blick zugeworfen.
(The teacher gave us a stern look.)
Die Vorschriften für die Sicherheit sind äußerst streng.
(The safety regulations are extremely strict.)
Der Arzt hat ihr absolute Bettruhe und eine strenge Diät verordnet.
(The doctor prescribed her absolute bed rest and a strict diet.)
Strikt
The word strikt means strictly rigid, absolute, or unconditional. It is used when there are absolutely no exceptions, loopholes, or compromises to a rule, order, or boundary. Unlike streng, it is rarely used to describe a person's overall character, but rather their specific actions, commands, or systems.
Wir haben strikte Anweisungen erhalten, niemanden hereinzulassen.
(We received strict instructions not to let anyone in.)
Rauchen ist in diesem Gebäude strikt verboten.
(Smoking is strictly forbidden in this building.)
Sie hält sich bei der Arbeit an einen strikten Zeitplan.
(She adheres to a strict schedule at work.)
Der Chef fordert die strikte Einhaltung aller Fristen.
(The boss demands strict compliance with all deadlines.)
Es gibt eine strikte Trennung zwischen Arbeit und Privatleben.
(There is a strict separation between work and private life.)
Hart
The word hart primarily translates to hard, but in the context of strictness, it means harsh, tough, or severe. It emphasizes the lack of mercy, the severity of a consequence, or the emotional and physical difficulty of a situation or person.
Der Richter verhängte eine unerwartet harte Strafe.
(The judge imposed an unexpectedly severe punishment.)
Seine Kritik an dem neuen Projekt war wirklich hart.
(His criticism of the new project was really harsh.)
Sie ist eine harte Geschäftsfrau, die keine Fehler verzeiht.
(She is a tough businesswoman who does not forgive mistakes.)
Das ist ein hartes Gesetz, aber es muss von allen befolgt werden.
(That is a harsh law, but it must be followed by everyone.)
Das Training für den Marathon war unglaublich hart.
(The training for the marathon was incredibly severe.)
Summary
To summarize, choose streng when referring to demanding authority figures and general discipline. Opt for strikt when describing absolute rules and commands that allow for zero exceptions. Use hart when you want to express that a person, punishment, or rule is harsh, tough, or unforgiving.