ペン胼胝[pendako] callus on one's middle finger (from writing)
耳に胼胝ができる[miminitakogadekiru] to be told or made to hear something so often that you (metaphorically) get calluses on your ears
胼胝体[benchitai] corpus callosum

准胝観音[jundeikannon] Cundi (manifestation of Avalokitesvara)
座り胼胝[suwaridako] calluses (on one's ankles, insteps, etc.) caused by sitting seiza

圧観[akkan] highlight
偉観[ikan] magnificent sight
一面観[ichimenkan] one-sided view
厭世観[enseikan] pessimistic view of life
厭世悲観者[enseihikansha] pessimist

価値観[kachikan] sense of values
外観[gaikan] appearance
概観[gaikan] general view
楽観[rakkan] optimism
楽観的[rakkanteki] optimistic

ト音記号[toonkigou] G clef
ハ音記号[haonkigou] C clef
ヘ音記号[heonkigou] F clef
哀音[aion] sad voices
異音[ion] allophone

異句同音[ikudouon] in concert
異口同音に[ikudouonni] in one voice
一音節[ichionsetsu] monosyllable
一口同音[ikkudouon] reading in unison
羽音[haoto] sound of flapping wings (of a bird)