Word: knockdown
Part of speech: Noun
Syllables: knock
down
Definition: A genetically modified organism that carries one or more genes in its chromosomes that have been made less active or had their expression reduced.
Morphemes:
Affix: knock
Language: en
PoS: Noun
Meaning: Preignition, a type of abnormal combustion occurring in spark ignition engines caused by self-ignition; also, the characteristic knocking sound associated with it.
Affix: down
Language: en
PoS: Noun
Meaning: A negative aspect; a downer.