(idiomatic) to take one's hat off; to acknowledge another's superiority

(in compounds) sonic

(video games) Short for ソニック・ザ・ヘッジホッグ (Sonikku za Hejjihoggu): Sonic the Hedgehog (video game series or the titular character)

kulfi

donor, contributor

ropes course

nationalistic; ultranationalistic

catchphrase

to request one's own resignation

(mathematics) geometric mean, specifically, if the variables a, b, c satisfy the relation a:b=b:c, then b is the 幾何中項 of a and c.