Serbo-Croatian kasno

← Bulgarian късно (cognate)

← Old Church Slavonic късно (mention)

← Old Church Slavonic оукъснѣти (mention)

← Old Church Slavonic закъснѣние (mention)

← Old Church Slavonic късенъ (mention)

← Lithuanian kušlas (cognate)

← Latvian kusu (cognate)

← Russian косный (cognate)

← Serbo-Croatian kasno (mention)

← Serbo-Croatian kasan (mention)

← Serbo-Croatian k (mention)

← Serbo-Croatian san (mention)

→ Bulgarian късно (cognate)

→ Serbo-Croatian kasno (mention)

→ Serbo-Croatian prekasno (prefix)