(dentistry) periodontitis

(pathology) collagenosis, collagen disease

(fiction) Hanahaki, an illness affecting those consumed by unrequited love that manifests as the coughing up of flowers, which clears up upon reciprocation. A fictional illness, it has found popularity among both Japanese and foreign online fanfic (especially) artists and authors for its poetic quality.

prosperous, flourish / frequent, busy, bustle

kudzu

smart / quick-witted / clever / intelligent

(UK) micrometre, (US) micrometer

(computing) format, file type / format of digital media such as DVDs / the form that something takes, in style, size, pattern, and so on

younger sister

to arrive / to wear