Standard Korean, most speakers in both Koreas no longer distinguish vowel length. <span class="searchmatch">경비병</span> • (gyeongbibyeong) (hanja 警備兵) sentry, guard 경비 (警備, gyeongbi)...
gyeongbi-reul seoda ― to keep guard 경비대(警備隊) (gyeongbidae) 경비망(警備網) (gyeongbimang) <span class="searchmatch">경비병</span>(警備兵) (gyeongbibyeong) 경비선(警備線) (gyeongbiseon) 경비선(警備船) (gyeongbiseon) 경비실(警備室)...