unit of basal body temperature, 0 being 35.5 °C and 50 being 38 °C, used for fertility awareness

Short for バーチャルYouTuber (bācharu yūchūbā, “virtual YouTuber”).

high five

high heels

knee socks, knee highs (a sock that reaches almost up to the knee)

a high card

Alternative spelling of ハイタッチ

high-resolution, high definition

(mahjong) short hand (illegal hand containing too few tiles)

a garment with a high neckline, or such a neckline itself; polo-neck, turtleneck