siim 1intrans. to watch closely without being seen; to spy on. Munsiim ta inilanay atona. He is spying on them so that he will know what to do. muN‑/nuN‑. 1C General class. (sem. domains: 2.3.1 - See.) 2trans. to watch closely something in particular. Siimmonay pangayan nan lalaki. He keeps watching where the man goes. ‑on/‑in‑. Language Of Borrowing: Ilocano.