pomegranate
榴 centers on the pomegranate fruit, often appearing in the compound 石榴 (ざくろ). Its meaning is specific to this fruit.
榴 combines 木 (tree) with 留, which likely contributes the sound. The character was created to name the pomegranate tree.
A tree 木 with something that looks like a pomegranate on the right: the 留 part resembles a fruit with seeds inside. Picture a pomegranate hanging from a tree.
For ル, imagine a pomegranate rolling off the tree: the rolling sound 'ru' cues ル.
hand grenade; grenade
pomegranate (Punica granatum)
high-explosive projectile
low door used in bathhouses to prevent the hot water from cooling (Edo period)
garnet
howitzer
shrapnel (shell)
eclogite
grossular; grossularite
andradite
leucite
almandine
grossular
pyrope
almandine
almandine