cibyfu'ivla lujvo

x1=v1=f1 is a stage 3 fu'ivla meaning x2=v2, based on word x3=f2 in language x4.

'stage 3 fu'ivla' is a term specific to Lojban and described in 'The Complete Lojban Language', chapter 4, section 7. The definition is similar to that of fu'ivla, but with the x3 place of fu'ivla omitted. x1 is assumed to be a word in Lojban as the concept doesn't make much sense for other languages. See also pavyfu'ivla - 'stage 1 fu'ivla', relfu'ivla - 'stage 2 fu'ivla' and vonfu'ivla - 'stage 4 fu'ivla'

In notes:

fu'ivla
x1=v1=f1 is a loanword meaning x2=v2 in language x3=v3, based on word x4=f2 in language x5.
fukyvlarafsi
r1 is the rafsi prefix used in stage-3 fu'ivla v1=f1, rafsi based on word r2.
gimyzevla
x1 is a stage 3 fu'ivla/zi'evla meaning x2, based on gismu/root word x3 in language x4
pavyfu'ivla
x1=v1=f1 is a stage 1 fu'ivla meaning x2=v2, based on word x3=f2 in language x4.
relfu'ivla
x1=v1=f1 is a stage 2 fu'ivla meaning x2=v2, based on word x3=f2 in language x4.
vonfu'ivla
x1=v1=f1 is a stage 4 fu'ivla meaning x2=v2, based on word x3=f2 in language x4.