Word: antiknock
Part of speech: Noun
Syllables: an
ti
knock
Definition: Such a substance, usually tetraethyl lead (also MMT, MTBE and ethanol)
Morphemes:
Affix: anti-
Language: en
PoS: Prefix
Meaning: Related to antiparticles; with the same mass but with opposite physical charges (such as electric charge)
Affix: knock
Language: en
PoS: Noun
Meaning: A sharp impact.