This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Inclined to investigate; eager for knowledge.

adj. Unduly curious and inquiring. See Synonyms at curious.

adj. Eager to acquire knowledge.

adj. Too curious; overly interested; nosy.

adj. Disposed to ask questions, especially in matters which do not concern the inquirer.

adj. Given to examination, investigation, or research; searching; curious.

n. A person who is inquisitive; one curious in research.

Addicted to inquiry or research; disposed to seek information; given to prying into matters; eagerly curious.

Marked by inquiry; questioning; curious; hence, searching out; bringing to view.

Synonyms Prying, etc. (see curious), inquiring.

adj. showing curiosity

adj. inquiring or appearing to inquire

"First Impression: Walter is described as an inquisitive thinker who loves reading, chess, bird watching, and other old-fashioned activities."

curious    inquiring   

inquisitively    inquisitiveness   

intrusive    curious    prying    inquiring    meddling    searching   

observant    inquire    thoughtful    eager    shrewd    suspicious    cautious    mischievous    shy    ambitious