firsthand

or first-hand

[ furst-hand ]

adverb

1. from the first or original source:

   We heard the news of the accident firsthand from a witness.

adjective

1. of or relating to the first or original source.
2. direct from the original source:

   firsthand knowledge of the riot.

Word History and Origins

Origin of firsthand¹

First recorded in 1690–1700; first + hand

Example Sentences

The effects of war on those who fight and witness it firsthand can linger long after peace has been made and the troops have come home.

From Science Daily

There he experienced, firsthand, the work of path breakers like Merce Cunningham, Trisha Brown and Meredith Monk.

From New York Times

Growing up in Oahu’s Palolo Valley in a big Samoan family, he’d felt that power firsthand.

From Los Angeles Times

But for those who have watched his progress firsthand, it’s hard not to imagine what it would mean for a Samoan quarterback to become a star at USC.

From Los Angeles Times

Whatever praise has been heaped upon Cincinnati’s Ja’Marr Chase, Chargers cornerback Kristian Fulton has already heard — and seen — it firsthand.

From Los Angeles Times