Translation guide
The English verb 'complicate' means to make something more complex, difficult, or entangled. In Japanese, there is no single direct equivalent; instead, various verbs and expressions are used depending on the nuance.
To express that an action or factor adds difficulty or complexity to a situation, plan, or problem.
His explanation further complicated the problem.
The new rules are complicating the procedure.
To make a situation worse or more tangled, often through mishandling. Commonly used for relationships, negotiations, or illnesses.
I complicated the discussion by saying unnecessary things.
I don't want to complicate my relationship with her.
To make something messy or confusing. More colloquial than 複雑にする. Often used for situations that become tangled or hard to understand.
He came in and complicated the discussion.
Saying that will only complicate the situation.
To make something troublesome or bothersome. Focuses on the added hassle rather than abstract complexity.
His demands complicated the plan.
To describe making a design, system, or object more elaborate or involved.
To express that a person becomes caught up in something complex or problematic.
To involve or drag someone into a situation, often with negative connotations. Not a direct translation of 'complicate', but used when someone's involvement complicates things.
Involving him will complicate the situation.
To make someone stick their nose into something, causing complications. Very casual and idiomatic.
There is no single Japanese verb that directly corresponds to 'complicate'. Using 'コンプリケートする' is not natural. Instead, use phrases like 複雑にする or context-appropriate verbs.
complicate the problem
複雑にする is neutral and can be used in formal contexts. ややこしくする is colloquial and implies a messy, confusing complication. こじらせる often implies worsening through mishandling, especially in relationships or health.
The explanation became complicated.
That author likes to complicate the plot.
Letting him stick his nose in will complicate things.
The story got messy/complicated.