Anxious is a synonym of Worried. Worried is related to Fear. Fear is a type of Book. Book is related to Hard. 
Witness is related to Legal. Legal is related to Sue. Sue is related to Court. Court is related to Trial. 
Anxious <--Synonym--> Worried <--RelatedTo--> Fear --IsA--> Book <--RelatedTo--> Hard 
Witness <--RelatedTo--> Legal <--RelatedTo--> Sue <--RelatedTo--> Court <--RelatedTo--> Trial 