radiate - issue or emerge in rays or waves; "Heat radiated from the metal box"

leak - enter or escape as through a hole or crack or fissure; "Water leaked out of the can into the backpack"; "Gas leaked into the basement"

escape - issue or leak, as from a small opening; "Gas escaped into the bedroom"

fall - come out; issue; "silly phrases fell from her mouth"

debouch - pass out or emerge; especially of rivers; "The tributary debouched into the big river"

pop out, fall out, come out - come forth or out; "You stick the coins in, but they come out again"; "His hair and teeth fell out"

arise, originate, spring up, uprise, develop, grow, rise - come into existence; take on form or shape; "A new religious movement originated in that country"; "a love that sprang up from friendship"; "the idea for the book grew out of a short story"; "An interesting phenomenon uprose"

break - come forth or begin from a state of latency; "The first winter storm broke over New York"