This word is from the Spanish seguro. Do note, however, that the Spanish word seguro means ‘sure’ but in Tagalog it means ‘maybe’ or ‘perhaps’.
Maybe they got lazy.
Maybe she/he doesn’t like meat.
It probably rained.
Siguro nagalit ang tatay mo.
Your father must have gotten angry.
A native Tagalog word for ‘maybe’ is baka.
The Filipino word for ‘sure’ is sigurado.
Non-standard spelling variations: cguro, ciguro