Radical 宀

8 strokes

house 宀 (91a) + upright疋 (30b) = decide on 定

决定 (404) juédìng decide; decision

一定 (1) yídìng fixed, specified

Since the house was on a riverbank he checked carefully that it was upright before deciding on whether to buy it. / The dwarf was happy that he could tie up his dinghy alongside.