볼펜
bolpen · TOPIK 1
ballpoint pen
🖊️ 볼펜 = 볼 (ball) + 펜 (pen), borrowed straight from English ball pen
A Konglish loanword: 볼 is English ball and 펜 is English pen, so bolpen is just ball pen said with Korean sounds. Korean has no final L+P cluster issue here, so it stays close to the original: bol-pen.