匕首[aikuchi] dagger
匕箸[hicho] spoon and chopsticks

一匕[ippi] one spoon
石匕[sekihi] stone knife (Jomon-period tool, shaped like a rice spoon)

垂迹[suijaku] temporary manifestation by a buddha (in order to save people)
筆迹[hisseki] handwriting
真迹[shinseki] true autograph

事迹[jiseki] evidence
本地垂迹説[honjisuijakusetsu] manifestation theory (holding that Shinto gods are manifestations of buddhas)
迹門[shakumon] first half of the Lotus Sutra, in which the Buddha appears as a spatiotemporally restricted being