downgraden.
英 'daʊngreɪd; daʊn'greɪd | 美 ,daʊn'ɡred
中文n. 退步；下坡\nadj. 下坡的\nadv. 下坡地\nvt. 使降级（过去式downgraded，过去分词downgraded，现在分词downgrading，第三人称单数downgrades）；小看
退步；下坡
adj. 下坡的
adv. 下坡地
vt. 使降级（过去式downgraded，过去分词downgraded，现在分词downgrading，第三人称单数downgrades）；小看
词根词源
downgrade (v.)1930, from down (adv.) + grade (v.). Related: Downgraded; downgrading. As a noun, "a downward slope," from 1858.
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