This root form (lemma) is used in 4 different forms in the NT: σείσω (IFA1··S), σειομένη (PPP·NFS), ἐσείσθη (IAP3··S), ἐσείσθησαν (IAP3··P).
It is glossed in 4 different ways: ‘being shaken’, ‘was shaken’, ‘were shaken’, ‘will_be shaking’.
OET MAT 21:10 Greek word=ἐσείσθη (eseisthaʸ) Morphology=IAP3··S English gloss=‘was shaken’ SR GNT MAT 21:10 word 7
OET MAT 27:51 Greek word=ἐσείσθη (eseisthaʸ) Morphology=IAP3··S English gloss=‘was shaken’ SR GNT MAT 27:51 word 22
OET MAT 28:4 Greek word=ἐσείσθησαν (eseisthaʸsan) Morphology=IAP3··P English gloss=‘were shaken’ SR GNT MAT 28:4 word 7
OET HEB 12:26 Greek word=σείσω (seisō) Morphology=IFA1··S English gloss=‘will_be shaking’ SR GNT HEB 12:26 word 17
OET REV 6:13 Greek word=σειομένη (seiomenaʸ) Morphology=PPP·NFS English gloss=‘being shaken’ SR GNT REV 6:13 word 28