We have the verb {mer} for "surprise". In english, does the verb "surprise", has an inherent positive or negative meaning ?

Are both of the following acceptable ?

{muQuchmoH be'nalwI', mumerpu'}

my wife surprised me, in order to make me happy

{romuluSnganpu' peqmeH tlhInganpu', merpu'}

the klingons surprised the romulans in order to slaughter them

English surprise is neither inherently positive nor inherently negative. Without any evidence, I would not assume that Klingon mer is either.

-- 
SuStel
http://trimboli.name