兼ねる

to be unable to; to find difficult (unpleasant, awkward, painful) to do

after the -masu stem of verb

to serve two or more functions or roles simultaneously; to contain (or combine) two or more features

to work in two or more jobs simultaneously (positions, etc.); to do alongside

to hesitate to do something (out of consideration for others)

to think of the future (as well as the present)