What this suffix does
The suffix -scope comes from Greek "skopein" (to look, to examine) and names instruments designed to observe or examine something. From "micro-" (small) comes "microscope"; from "tele-" (far) comes "telescope".
The Spanish equivalent is -scopio: microscope → microscopio, telescope → telescopio. The correspondence is almost perfect.
The most common roots with -scope
The first part of the compound identifies what or where you observe:
micro- (small): microscope (sees bacteria, cells)
tele- (far): telescope (sees stars, planets)
steto- (chest): stethoscope (listens to the heart)
endo- (inside): endoscope (sees inside the body)
peri- (around): periscope (sees above a surface)
kaleo- (beautiful): kaleidoscope
gyro- (rotation): gyroscope
horo- (hour): horoscope ("seeing the birth hour")
The word family: -scope, -scopy, -scopic
"Scope" alone in modern English means "range" or "field" ("outside the scope of this project") — not an instrument.
The -scope word family:
-scope = the instrument (microscope)
-scopy = the technique/process (microscopy, endoscopy, laparoscopy)
-scopic = the adjective: microscopic (very small), telescopic (seen through a telescope)