1. (脸色)健康红润的，通红的
If you describe someone's face as ruddy, you mean that their face is a reddish colour, usually because they are healthy or have been working hard, or because they are angry or embarrassed.
e.g. He had a naturally ruddy complexion...
他的脸色天生红润。
e.g. His face is still ruddy and handsome.
他的脸依然红润帅气。
2. 淡红色的;微红的
Something that is ruddy is reddish in colour.
e.g. ...barges, with their sails ruddy brown from regular dressing of ochre.
船帆由于经常涂染赭石变成了淡红棕色的游艇
3. (表示强调，尤用于生气时)该死的，要命的
Ruddy is used by some people to emphasize what they are saying, especially when they are angry.
e.g. He took the paraffin stove on a picnic and the ruddy thing wouldn't work.
他带了那个煤油炉去野餐，但是那个该死的东西根本用不了。
adj
1. of a color at the end of the color spectrum (next to orange)
resembling the color of blood or cherries or tomatoes or rubies
Synonym: redreddishblood-redcarminecerisecherrycherry-redcrimsonrubyruby-redscarlet
2. inclined to a healthy reddish color often associated with outdoor life
e.g. a ruddy complexion
Santa's rubicund cheeks
a fresh and sanguine complexion