JLPT N1 Advanced
主たる
Principal or main (formal/written)
Readings
Other forms
主な a more common, less formal equivalent
Pre-noun adjectival (連体詞 - rentaishi)
"Main" / "Principal"
Designates the primary, leading, or most significant element among others in a formal context.
Example
事故 の 主たる 原因 は 、 スピード の 出し過ぎ でした 。
The principal cause of the accident was excessive speed.
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