Naive, wet behind the ears, green, inexperienced.(adjective)
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Use "unweaned" in a sentence
"Defence lobbyists such as the Conference of Defence Associations -- largely composed of reserve and retired officers -- were dismissed as special-interest grumblers or as corporatist interests unweaned from the public udder."
"Although she makes the product near her shop in Belmont, Mass., the prerequisite culture harkens from her homeland where the rennet is found in the tummies of unweaned lambs."
"Do you think me foolish as a babe unweaned, not to know this?"