French Phrase
C'est un sujet compliqué.
Meaning
Literally, "It's a complicated subject." It conveys that the topic being discussed is difficult to understand or untangle.
When to use
Use this sentence when you want to comment on the difficulty of a topic, whether in a classroom discussion, a work meeting, or a casual conversation about a news story or personal matter.
✦Grammar Breakdown
C'estunsujetcompliqué.
C'est
Contraction of "ce" + "est"; used to identify or describe something.
un
Indefinite article for masculine singular nouns.
sujet
Masculine noun meaning "subject" or "topic".
compliqué
Adjective meaning "complicated"; must agree in gender and number with the noun it modifies.
🗨In Conversation
Ce sujet te paraît-il difficile à comprendre ?
Does this subject seem difficult for you to understand?
Oui, c'est un sujet compliqué.
Yes, it's a complicated subject.
✕Common Mistakes
C'est un sujet compliquée.
The adjective must agree with the masculine noun "sujet"; use the masculine form "compliqué".
Il est un sujet compliqué.
When the predicate includes a noun phrase, French uses "c'est" not "il est".
↔Alternatives
C'est un sujet difficile.
It's a difficult subject.
C'est un sujet complexe.
It's a complex subject.
Ce sujet est compliqué.
This subject is complicated.
Cultural Tip
In French, "compliqué" often hints at personal difficulty or a tangled situation, while "complexe" sounds more neutral and academic. Also, "C'est" is the go‑to construction for identification; avoid using "Il est" with a noun phrase like this.