電離層

ionosphere

lightning / electricity / electric (bound form) / to get (or give) an electric shock / phone call or telegram etc / to send via telephone or telegram etc

ion / ionized (e.g. gas)

surname Li

to leave / to part from / to be away from / (in giving distances) from / without (sth) / independent of / one of the Eight Trigrams 八卦[ba1 gua4], symbolizing fire / ☲

to pile on top of one another / layer; stratum / floor (of a building); story / (math.) sheaf / classifier for layers