験 is built from the 馬 and 僉 (all / together (in 検·険)) components.
It belongs to a phonetic family with 検, 険, 剣, and 倹 — they share the 僉 component and the reading ケン.
A common word using 験 is 経験 (けいけんする), meaning “experience”.
Don't confuse it with 険, 検, 倹, and 剣 — 馬 test, 阝 steep, 木 examine, 亻 frugal
