GRAV- [GRIEV-] ... heavy
FORT- ... strong
NIHIL- ... nothing
ALIEN- ... of another
LOC- ... place
DUC-, DUCT- ... to lead
LOQU-, LOCUT- ... to speak
FIN- ... end, limit
SPIR- ... to breathe
LUD-, LUS- ... to play, mock
ab-, a-, abs- ... away, from
circum- ... around
con-, com-, co-, etc. ... with, together, very
contra-, contro-, counter- ... against
dis-, di-, dif- ... apart, in different directions, not