loy·al 
/ˈlojəl/ adjective
/ˈlojəl/ adjective [more loyal; most loyal] : having or showing complete and constant support for someone or something : faithful
▪ The team has many loyal fans. ▪ a loyal customer/supporter ▪ a loyal friend ▪ She has provided the company with many years of loyal service. ▪ fiercely/steadfastly loyal — often + to ▪ She has remained/stayed loyal to her old friends. — opposite disloyal
▪ The team has many loyal fans. ▪ a loyal customer/supporter ▪ a loyal friend ▪ She has provided the company with many years of loyal service. ▪ fiercely/steadfastly loyal — often + to ▪ She has remained/stayed loyal to her old friends. — opposite disloyal
— loy·al·ly adverb
▪ has served loyally for many years
▪ has served loyally for many years
