[ik-splawr-uh-tawr-ee, -splohr-uh-tohr-ee or ik-splawr-uh-tiv, -splohr-]
Origin of exploratory
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
mid-15c., from Latin exploratorius "belonging to scouts," from explorator "scout," from explorare (see explore). Alternative explorative is from 1738.
Online Etymology Dictionary, © 2010 Douglas Harper