Answer:
炎 EN, honou - flame
冓 KOU, kama(eru), ku(mu) - build, assemble
中 CHUU, naka - middle, medium
容 YOU - form, appearance, content
共 KYOU, tomo - together, both, all
Add the "water" radical (氵sanzui) to see what happens!
淡 TAN, awa(i) - light, feint, pale, transitory
溝 KOU, mizo - ditch, gutter, groove
沖 CHUU, oki - open sea
溶 YOU, to(keru), to(ku), to(kasu) - melt, dissolve
洪 KOU - flood, inundation, vast