拡

カク、コウ

ひろ.がる、ひろ.げる、ひろ.める

拡, 扌, 広, 广, 厂, 厶

手

broaden, extend, expand, enlarge

拡大(かくだい): magnification; enlargement; expansion
拡張(かくちょう): expansion; extension; enlargement; escape; ESC
拡散(かくさん): scattering; diffusion; spread (e.g. signal across the spectrum)
拡充(かくじゅう): expansion