x1=t1=t3=fa2=v1=fu'ivla1 is a fu'ivla synonym variant meaning x2=v2=fu'ivla2 based on lujvo/word x3=t2=fa3=fu'ivla4, with meaning understood by / to / dictionary x4=v3=fu'ivla3.
Distinguishability vs semantic similarity can be considered as well. You may also use ‘y’ to join fu'ivla into a lujvo rather than using a top-level fu'ivla. If a vowel would be adjacent to the ‘y’, you can add an apostrophe between the vowel and the ‘y’ hyphen. Example: «zo mulrkai cu jbofu'ivlafavytsi zo mulkai».