Where does “iskeptiko” come from?

iskeptiko (Tagalog) comes from English skeptic, from Latin scepticus, from Ancient Greek σκεπτικός, from Ancient Greek σκέπτομαι, from Proto-Hellenic sképťomai, from Proto-Indo-European spéḱyeti, from Proto-Indo-European speḱ- — to see, to look, to observe.

Ancestry of “iskeptiko”, step by step

StepLanguageWordMeaning
1EnglishskepticSomeone who habitually doubts beliefs and claims...
2LatinscepticusThe sect of skeptics
3Ancient Greekσκεπτικόςthoughtful, inquiring; a sceptic, a member of the...
4Ancient GreekσκέπτομαιI look at, examine; I examine, consider, think
5Proto-Hellenicsképťomaito look at
6Proto-Indo-Europeanspéḱyetito be looking at, to keep looking at
7Proto-Indo-Europeanspeḱ-to see, to look, to observe
Every word from Proto-Indo-European speḱ-