G4820–συμβάλλω–sumballō

But Mary kept all these sayings, pondering them in her heart.

συμβάλλουσα sumballousa “pondering [them]”

Or what king, as he goes to encounter another king in war, will not sit down first and consider whether he is able with ten thousand to meet him who comes against him with twenty thousand?

συμβαλεῖν sumbalein “to engage”

But when they had commanded them to go aside out of the council, they conferred among themselves,

συνέβαλλον suneballon “they were confering”

Some of the Epicurean and Stoic philosophers also were conversing with him. Some said, "What does this babbler want to say?" Others said, "He seems to be advocating foreign deities," because he preached Jesus and the resurrection.

συνέβαλλον suneballon “were encountering”

When he had determined to pass over into Achaia, the brothers encouraged him, and wrote to the disciples to receive him. When he had come, he greatly helped those who had believed through grace;

συνεβάλετο sunebaleto “he helped”

When he met us at Assos, we took him aboard, and came to Mitylene.

συνέβαλλεν suneballen “he was meeting with”