Most often used as part of compounds: 迸发 (to burst forth - of energy, emotion), 迸射 (to shoot out - of sparks, light), 迸裂 (to split open). Standalone use is literary.
memory
The 辶 (walking) radical + 并 (combine) - picture forces combining and then bursting outward in a sudden release.
辶 is the motion radical 辵 in its bottom-left walking form. It signals sudden movement outward - here, the violent burst of sparks, water, or words gushing out (迸发, 迸射). Family includes 进 (advance), 退 (retreat), 逃 (flee), all marked by the same swept-foot stroke beneath.
并 (bìng) supplies the sound - initial preserved, rime drifted from -ìng to -èng with tone change. Same phonetic powers 饼 (cake), 屏 (screen), 拼 (piece together) - all riding the bing/píng cluster. Originally 並 (two people side-by-side); merged-and-bursting-forth-together fits 迸's image of multiple sparks flying simultaneously.
