umbra-, umbro-, umbr-, umbel- +
(Latin: shade, shadow)
umbrageous, umbrageously
1. Affording or creating shade, shady, coolness.
2. Easily offended, or likely to become irritated.
An umbrageous tree is a shade tree; but an umbrageous person is one who is quick to take offense or who is angered by some statement.
umbrageousness
Shadiness; as the umbrageousness of a tree.
umbral
1. A shaded area.
2. A conical shadow excluding all light from a given source; specifically, the conical part of the shadow of a celestial body excluding all light from the primary source.
3. The central dark part of a sunspot.
umbrate, umbrated
To shade; to shadow.
umbratic, umbratile
1. Of or pertaining to the shade or darkness; shadowy; unreal; secluded; retired.
2. Shadowy, foreshadowing.
umbraticole, umbraticolous
Living in shaded habitats or shady places.
umbratilous
Shadowy; shaded; indoor; secluded.
umbrella
1. A portable, collapsible divice for protection against the sun, rain, and snow consisting of a fabric canopy mounted on a sliding framework of ribs radiating from a central rod.
2. Something that covers or protects, as military aircraft shielding ground operations.
3. Something that encompasses or covers many different elements or groups.
4. In zoology, the contractile, gelatinous, rounded mass constituting the major part of the body of most jellyfish.
umbrette
A brown heron type of African bird, Scopus umbretta, having the head so crested as to resemble a "claw hammer" and so also known as a "hammerhead".
umbriferous
1. Causing a shadow.
2. Giving or bearing shade.
umbril
A visor on a helmet to protect the eyes from light.
umbrophile, umbrophilic, umbrophily
Thriving in shaded habitats.
umbrose
Shade-giving; dusky.
umbrosity
Shadiness.
umbrosous
Living in shaded habitats; also, umbraticolous.
Other related "dark; shadow, shade; black" units:
lygo-;
melan-;
nigri-;
nocti-;
nycti-;
scoto-;
skio-.