Adjective
undemarcated (not comparable)
Not demarcated.
The undemarcated border with Sudan poses a problem for Eritrean external relations. citation After a high-level delegation to the Sudan from the Eritrean Ministry of Foreign Affairs ties are being normalized. Source: Internet
Since 1996 both governments have remained wary of one another but relations are relatively normal. citation The undemarcated border with Ethiopia is the primary external issue facing Eritrea. Source: Internet