The méng reading (rising tone) is the literary / formal cluster: (1) physical covering -
蒙住 (cover up),
蒙面 (mask up),
蒙版 (layer mask in Photoshop); (2) receiving -
承蒙 ('to receive with gratitude', formal letter opener); (3) suffering -
蒙受 (sustain a loss),
蒙冤 (be wronged); (4) enlightenment / ignorance -
启蒙 (to enlighten - literally 'lift the cover'),
蒙昧 (uncivilised). All foreign-name transliterations (Edmond, Simon, Raymond, Hammond, Vermont, Montgomery, Mona Lisa) also take méng.