been around

• experiencedHaving practical knowledge gained
• seasonedFlavored or battle-tested
• veteranExperienced former soldier
• worldlyExperienced in practical affairs
• wiseShowing good judgment

weathered · aged · traveled · seen · endured · lasted · survived · mature · savvy · knowledgeable · streetwise · jaded · worn · familiar · ancient · timeless · circulated · existed

• life lessonslesson learned, moral, lessons learned, life lessons, parable
• maturityadulthood, immature, come of age, ripe, unripe