5 strokes
凸凹
dekoboko
uneven; bumpy
凸面
totsumen
convex surface
凸版
toppan
letterpress; relief printing
Study kanji on LenGaki

Get the Android app
The app adds offline study, home-screen widgets, stroke-order tracing, speaking practice with pronunciation scoring, and an AI tutor that answers questions in context — none of which fits in a browser tab.