浓密

浓 = 农 + 氵 : Nelson Newt (nu) is watering his monoculture (农) in the engine's kitchen ((e)ng2). He added a lot of fertilizer to the water in his water bottle (氵) and as he empties the bottle a thick (浓) fog with a strong (浓) smell is emerging from the liquid.

密 = 宀 + 必 + 山 : Marilyn Monroe (mi) is secretly (密) making out with her secretary (密) Khubilai Khan (必). Because it has to be a secret (密), they meet in the space station's bathroom (Ø4) and hide under a huge graduation cap (宀). Just to be sure Khubilai Khan has two forks (山) in his hands to attack anyone who might enter and see them.