Trip is etymologically related to Trap. Trap is a synonym of Pin. Pin is a synonym of Fall. Fall is the opposite of Climb. 
Stable is a type of Illness. you are likely to find Cow in/at/on Stable. Cow is a synonym of Discourage. Discourage is a synonym of Warn. 
Trip --EtymologicallyRelatedTo--> Trap <--Synonym--> Pin <--Synonym--> Fall <--Antonym--> Climb 
Illness <--IsA-- Stable <--AtLocation-- Cow <--Synonym--> Discourage <--Synonym--> Warn 