dec·o·rous 
(dĕkər-əs, dĭ-kôrəs)
(dĕkər-əs, dĭ-kôrəs)adj.
Characterized by or exhibiting decorum; proper: decorous behavior.
[From Latin decōrus, becoming, handsome, from decor, seemliness, beauty; see dek- in the Appendix of Indo-European roots.]
deco·rous·ly adv.
deco·rous·ness n.
- lighten
- lighten up
- lighter
- lighter
- lighterage
- lighter-than-air
- lightface
- lightfaced
- light-fingered
- light-fingeredness
- lightfoot
- light-footed
- light-footedly
- light-footedness
- light-handed
- light-handedly
- light-handedness
- lightheaded
- lightheadedly
- lightheadedness
- lighthearted
- lightheartedly
- lightheartedness
- light heavyweight
- "Light Horse Harry."