taciturn
'> : to cause to unite into a chemical compound //combining hydrofluoric acid with soda ash to form sodium fluoride
: to unite into a single number or expression //Combine fractions and simplify.
: to possess in combination //a writer whose works combine imagination and scholarship
: to become one //The two newspapers combined as the Chronicle.
: to unite to form a chemical compound
: to act together //Many factors combined to cause the recession. //Wolves combine in their hunt for deer.