亨
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亠
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口
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Mnemonic symbol: American scientist Joseph Henry.
Before Henry (亨) invented inductance he used to hang out with Hamlet (h) a lot in front of the engine ((e)ng1). One day he observed Hamlet shifting a mandarin (口) from a price cup (了) to a beret (亠) and vice versa, which gave him the idea of putting an iron core into an electromagnet.
to go through / to know well / (suffix) expert / to connect / to communicate / open / to clear / classifier for letters, telegrams, phone calls etc
通
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甬
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辶
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In front of the engine a pile of yongzhong bells were blocking the way. Tommy Turtle attended to the matter and cleared the way. He lined the bells up to two lines, put on his gladiator sandals and now marches right through this path screened by walls on two sides like a roman general.