Under-sécan

According to the Old English Dictionary:

under-sécan

p. -sóhte To investigate; discutere (cf. discutiens, i. judicans, querens, W rt. Voc. ii. 141, 42) :-- Ðæt is ðæt hié ðara ðing ðe him underðiódde bióð for ðam ege ánum ðæs innecundan déman underséce est subjectorum causas pro sola interni judicis intentione discutere, Past. 13; Swt. 79, 8. Ðæm láreówe is swíðe smeálíce tó underséceanne be ðæm weorcum ðara ofertrúwedena subtiliter ab arguente discutienda sunt opera protervorum, 32; Swt. 209, 12. [Huo þet heþ þise yefþe, he onderzekþ þe redes þet me him yefþ, Ayenb. 184, 23. Ger. untersuchen.] under-secan