long–stand·ing 
/ˈlɑ:ŋˈstændɪŋ/ adjective
/ˈlɑ:ŋˈstændɪŋ/ adjective : lasting or existing for a long time
▪ It was a long-standing tradition for them to camp in the mountains for a week during the summer. ▪ Some long-standing problems are finally being corrected. ▪ their long-standing relationship
▪ It was a long-standing tradition for them to camp in the mountains for a week during the summer. ▪ Some long-standing problems are finally being corrected. ▪ their long-standing relationship
