gung-ho - A description of an enthusiastic, perhaps over-enthusiastic, person.

take (one) aback - To astound; to catch one unprepared.

landlocked - An lake or area without sea/ocean access.

have one's nose in a book - To not participate in a conversation by reading - out of shyness, rudeness, because the reading material is more interesting than the conversation, etc.

nerd - A bookish, overly and obviously intellectual person, usually young.

Hi - An English greeting

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