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’.

Siguro tinamad sila.
Maybe they got lazy.

Siguro ayaw niya ng karne.
Maybe she/he doesn’t like meat.

Siguro umulan.
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