Word: greylist
Part of speech: Noun
Syllables: grey
list
Definition: A technique for blocking spam (junk e-mail) by temporarily rejecting mail from unknown senders. A legitimate sender is likely to try sending again after a delay.
Morphemes:
Affix: grey
Language: en
PoS: Adjective
Meaning: Alternative form of coloured. ; having color or a certain color; sometimes used in combination
Affix: list
Language: en
PoS: Noun
Meaning: The barriers or palisades used to fence off a space for jousting or tilting tournaments.