After World War I, though, the basic territorial pattern of the Balkans was set. Romania, Greece, Bulgaria, and Albania were independent countries and, with some exceptions, occupied their current borders. Today's countries of Serbia, Montenegro, and Macedonia were then part of Yugoslavia--a new country formed in 1918.
verb (used with object), undermined, undermining. 1. to injure or destroy by insidious activity or imperceptible stages, sometimes tending toward a sudden dramatic effect. 2. to attack by indirect, secret, or underhand means; attempt to subvert by stealth. 3. to make an excavation under; dig or tunnel beneath, as a military stronghold.
undermine verb [T]. C2 to make someone less âconfident, less âpowerful, or less âlikely to âsucceed, or to make something âweaker, often âgradually: The âpresident has âaccused two âcabinet âmembers of âworking âsecretly to undermine his âposition/him. Criticism just undermines âtheir âconfidence.