The word "pendulates" is spelled with a schwa sound in the second syllable. The IPA phonetic transcription for this word is /ˈpɛn.dʒə.leɪts/. The "u" in the second syllable is pronounced with an unstressed "uh" sound, which is why it is spelled with a "u" instead of an "a." The word means to swing or oscillate back and forth, and is commonly used in physics and engineering to describe the motion of a pendulum.