2. to be sure may sometimes mean certainly: tiyak, sigurado, pihado
3. to make sure, to be certain: tumiyak, tiyakin, magsiguro, siguruhin, siguraduhin, pumiho, pihuhin
problem
n.
1. a matter of doubt or difficulty: suliranin, problema
2. something to be worked out: problema, tanong
kaya
n.
1. kaya competence, ability
2. kaya' conj. perhaps, maybe, so, that's why, therefore. Kaya ako naparito... I have come here so that.... Kaya siya... That's why... mod. perchance, perhaps, might, expresses doubt or possibility of choice). Ano kaya ang iniutos mo sa kanya? What perchance did you order him to do?. Baka kaya nawala siya. He might have gotten lost.
duda
Sp n.
doubt [syn. alinlangan]
v.
magduda (mag-) to doubt. Huwag kang magduda sa akin. Don't doubt me.