Passenger
noun
If you take a ride as a guest (or a customer), that makes you a passenger.
じょうきゃく
This is a jukugo word that uses the on'yomi readings of the kanji. You hopefully learned the on'yomi for 乗 with the word 乗馬, but here's a mnemonic to help you just in case:
A passenger gets on at the next stop. Who is it? It's Jourm (じょう), the farmhand.
乗客にとって安全であることが何よりも重要です。
The most important thing is that it's safe for passengers.
タクシードライバーとのおしゃべりを楽しみにしている乗客もいる。
Some passengers look forward to chatting with cab drivers.
ホームには女性の乗客が一人で待っていた。
A female passenger was waiting alone on the platform.