na-adjective, noun which may take the genitive case particle 'no'
all-encompassing; unqualified; without limitation
Describes something that is not restricted or qualified, such as an opinion, statement, or scope. Often used in formal or written contexts.
彼の無限定な賛成には驚いた。
I was surprised by his unqualified approval.
無限定の権限を与えられた。
They were given all-encompassing authority.
限定的 means 'limited' or 'restrictive', the opposite of 無限定.
Compound of 無 (mu, 'without') and 限定 (gentei, 'limitation'). The exact historical derivation is uncertain, but the word follows a common pattern of forming adjectives meaning 'without X'.