[tlhIngan Hol] A question on {Qatlh}

the word {Qatlh} means: a. "to be difficult", as in "it is difficult to see you in pain". b. "to be difficult", as in "this mathematical problem is very difficult". c. "to be complicated", as in "the situation that we're facing is quite complicated". d. "to be complicated", as in "this system's backup method is quite complicated". or all of the above ? qunnoH ghoghwIj HablI'vo' vIngeHta'