at length(r = adv.all) lengthily - in a lengthy or prolix manner; "the argument went on lengthily"; "she talked at length about the problem"

N  lateness, tardiness, delay, delation, cunctation, procrastination, deferring, deferral, postponement, adjournment, prorogation, retardation, respite, pause, reprieve, stay of execution, protraction, prolongation, Fabian policy, medecine expectante, chancery suit, federal case, leeway, high time, moratorium, holdover, late, tardy, slow, behindhand, serotine, belated, postliminious, posthumous, backward, unpunctual, untimely, delayed, postponed, dilatory, delayed, in abeyance, late, lateward, backward, late in the day, at sunset, at the eleventh hour, at length, at last, ultimately, after time, behind time, after the deadline, too late, too late for, slowly, leisurely, deliberately, at one's leisure, ex post facto, sine die, nonum prematur in annum, against the sunbeams serotine and lucent, ie meglio tardi che mai, deliberando saepe perit occasio.

N  length, longitude, span, mileage, distance, line, bar, rule, stripe, streak, spoke, radius, lengthening, prolongation, production, protraction, tension, tensure, extension, line, nail, inch, hand, palm, foot, cubit, yard, ell, fathom, rood, pole, furlong, mile, league, chain, link, arpent, handbreadth, jornada, kos, vara, astronomical unit, AU, light- year, parsec, nanometer, nm, micron, micrometer, millimicron, millimeter, mm, centimeter, cm, meter, kilometer, km, pedometer, perambulator, scale, long, longsome, lengthy, wiredrawn, outstretched, lengthened, sesquipedalian, interminable, no end of, macrocolous, linear, lineal, longitudinal, oblong, as long as my arm, as long as today and tomorrow, unshortened &c (shorten), lengthwise, at length, longitudinally, endlong, along, tandem, in a line, in perspective, from end to end, from stem to stern, from head to foot, from the crown of the head to the sole of the foot, from top to toe, fore and aft.

arm's length, at arm's length, bishop's length, body length, cable length, cable's length, focal length, length, length of service