literal
The literal meaning of "ponder" is to "weight".
luminous
The hands on my alarm clock are luminous.
malpractice
Various malpractice by police officer are brought to light by the enquiry.
mastery
Her mastery of the piano was quite exceptional for a child of her age.
Medicare
The Medicare cost is estimated to be one billion dollars.
merge
The two marching column，s moved closer and finally merged together.