Morpheme
Spy
Type
free base
Denotation
watch stealthily
Etymology
Middle English spie, from aspy, aspien, espien; Old French espier
Evidence
antiespionage, antiespionage, counterespionage, counterespionage, espiable, espiable, espial, espial, espied, espied, espier, espier, espies, espies, espionage, espionage, espy, espy, espying, espying, nonespionage, nonespionage, spied, spies, spy, spycraft, spyess, spyglass, spyhop, spying, spyplane, spyware, spywork, unespied, unespied
Notes
<y> need not toggle (but can) with suffixes, especially in monosyllabic bases ending in <y>
