v.
Pronunciation: ' käm-pl ə - ˌ k ā t
Function: transitive verb
Inflected Form: -cat · ed ; -cat · ing
Date: 1672
1 : to combine especially in an involved or inextricable manner
2 : to make complex or difficult
3 : INVOLVE especially : to cause to be more complex or severe <a virus disease complicated by bacterial infection>