na-adjective, noun
vast and far-reaching
Literary or formal word describing something immense in scale and scope, such as plans, influence, or landscapes. Rare in everyday speech.
彼の構想は宏遠で、一国の枠を超えている。
His vision is vast and far-reaching, transcending the boundaries of a single nation.
この計画は広遠な影響を及ぼすだろう。
This plan will have a vast and far-reaching impact.
壮大 means 'grand' or 'magnificent', often with a positive aesthetic connotation, while 広遠 emphasizes vastness and far-reaching extent, more neutral and abstract.
広大 means 'vast' or 'extensive', typically for physical spaces; 広遠 adds the nuance of reaching far into the distance or future, often used for abstract concepts.
Compound of 広 (wide) and 遠 (far). The exact historical derivation is uncertain; the word is a literary Sino-Japanese term.