The standard lexica agree that κατέχω attests a wide but organized family of senses rather than a single core. BDAG groups the NT occurrences under four heads: (1) hold back, hinder, detain, confine (Luke 4:42; Phlm 13; Rom 1:18; 7:6; 2 Thess 2:6-7); (2) hold fast, retain, a perfective of ἔχω applied to tradition and confession (Luke 8:15; 1 Cor 11:2; 15:2; 1 Thess 5:21; Heb 3:6, 14; 10:23); (3) possess, occupy (Luke 14:9; 1 Cor 7:30; 2 Cor 6:10); and (4) the intransitive nautical "put in, make for shore" (Acts 27:40). LSJ organizes the classical evidence similarly and adds a distinct intransitive block including B.3 "prevail, hold sway." Hanse (TDNT II.829) explains the range by κατά, which either intensifies ἔχω ("hold firmly, possess") or reorients it downward ("hold down, restrain, suppress"), neither being more primitive. Moulton-Milligan document the everyday first-century uses (legal possession, arrest, detaining a visitor, being held by promise, debt, or disease), and the last parallels the John 5:4 variant, itself absent from the earliest witnesses (Metzger). In the LXX κατέχω renders mainly חזק (Hiphil, hold fast), עצר (restrain), אחז (grasp), ירש (possess), and תמך (uphold), and the wisdom idiom of holding fast to instruction stands behind Paul's paraenesis. Two passages remain lexically consequential: at Rom 1:18 the near-consensus of critical commentators (Cranfield, Dunn, Moo, Jewett, Fitzmyer, Schreiner) reads "suppress" on contextual grounds, against an older "hold/possess" reading (Sanday-Headlam, Murray); at 2 Thess 2:6-7 no consensus exists on either the sense or the referent of τὸ κατέχον / ὁ κατέχων, with a traditional transitive "restrain" reading (Rome, gospel, or Michael as candidates: Bruce, Cullmann, Nicholl, Weima), a minority intransitive "hold sway / seizing power" reading (Giblin, Robinson, Krodel), and a substantial school treating the reference as deliberately veiled apocalyptic diction (Trilling, Metzger, Malherbe). Wanamaker, Best, and Fee canvass the options and decline to decide.