The word 忠告 is formed by combining two conceptual elements: 忠, which conveys "loyalty" and "devoted sincerity", with 告, which means "to tell" or "to inform". The formation creates a composite idea where the act of telling or advising (告) is intrinsically shaped by the quality of loyalty and earnest care (忠). Thus, it isn't merely a "telling", but rather a "sincere telling" or counsel offered with the other's best interest at heart, fusing the motive with the action into a single unified concept.