to call together / to summon / to convene / temple or monastery (used in place names in Inner Mongolia)
召
=
刀
+
口
:
Mnemonic symbol: an intercom to call everyone together. James II of England (zh) prepares a few mandarins (口) for everyone in the aorta's bathroom (ao4) by cutting them with a cleaver (刀). As he is finished he calls everyone together (召) over the intercom (召) to come over and fetch a piece.
唤
=
口
+
奂
:
Helga Horse (hu) bred a genetically modified mandarin (口) and calls (唤) it for the first time in the anthill's bathroom (an4). As the mandarin promptly hops towards Helga she joins the tips of her hooves and exclaims "excellent!" (奂)