first·hand 
/ˈfɚstˈhænd/ adjective
/ˈfɚstˈhænd/ adjective : coming directly from actually experiencing or seeing something
▪ He gave a firsthand account of the battle. ▪ She draws on firsthand experiences for her novel. — compare secondhand; see also at first hand at 1first
▪ He gave a firsthand account of the battle. ▪ She draws on firsthand experiences for her novel. — compare secondhand; see also at first hand at 1first
— firsthand adverb
▪ He knows firsthand how difficult school can be.
▪ He knows firsthand how difficult school can be.
