base

cover all the bases: seecover.

get to first base achieve the first step towards your objective. informal, chiefly North American

1962P. G. WodehouseService with a Smile She gives you the feeling that you'll never get to first base with her.

off base mistaken. North American informal

1947Time Your Latin American department was off base in its comparison of the Portillo Hotel in Chile with our famous Sun Valley.

touch base briefly make or renew contact with someone or something. informal

1984Armistead MaupinBabycakes In search of a routine, he touched base with his launderette, his post office, his nearest market.

☞ Base in these three phrases refers to each of the four points in the angles of the 'diamond' in baseball, which a player has to reach in order to score a run.