bronchoscopy (n.)

"bronchial tubes," 1670s, from Latinized form of Greek bronkhia, plural of bronkhos "windpipe, throat," which is of unknown etymology.

word-forming element meaning "viewing, examining, observing," from Modern Latin -scopium, from Greek -skopion, from skopein "to look at, examine" (from PIE root *spek- "to observe").