extensive and wide-ranging; broad and multifaceted
Describes something that covers a wide area and branches into many aspects, such as a discussion, field of study, or range of topics. Often used in formal or written contexts.
His knowledge is extensive and wide-ranging.
A broad and multifaceted range of topics was discussed at the meeting.
多岐 alone means 'many branches' or 'diversified', while 広範多岐 adds the nuance of broad coverage.
広範 means 'extensive' or 'wide-ranging', but 広範多岐 emphasizes both breadth and diversity of aspects.
Compound of 広範 (broad, extensive) and 多岐 (many branches, diverse). The exact historical derivation is uncertain, but the combination is used to express both wide scope and multifaceted nature.