The Greek word “boao”

Found in Mt. 3:3; Mk. 1:3; 15:34; Lk. 3:4; 9:38; 18:7, 38; Jn. 1:23; Acts 8:7; 17:6; 21:34; 25:24; Gal. 4:27, the Greek verb “boao” meant “appeal to,” “shout,” “cry out.”

John the Baptist “cried out” in the wilderness (Mt. 3:3; Mk. 1:3; Lk. 3:4; Jn. 1:23). Jesus “cried out” while on the cross (Mk. 15:34). It is possible to “cry out” to God “day and night” (Lk. 18:7). A mob may “cry out” or be involved with “shouting” (Acts 25:24). This term can be associated with joy (Gal. 4:27), agony (Acts 8:7), or crying out for help (Lk. 18:38).