動(dòng)詞 inflect:

1. change the form of a word in accordance as required by the grammatical rules of the language
2. vary the pitch of one's speech
   同義詞：tone, modulate

1. By inflecting the voice more one can hold the attention of an audience.
   講話聲音有些抑揚(yáng)變化可以吸引住聽(tīng)眾的注意力。
2. Most English verbs are inflected with `-ed' in the past tense.
   英語(yǔ)大多數(shù)動(dòng)詞過(guò)去式詞尾均變化為-ed的形式。

in.flect

v.（動(dòng)詞）
in.flect.ed,in.flect.ing,in.flects
v.tr.（及物動(dòng)詞）
To alter (the voice) in tone or pitch; modulate.
變音：在音高和音調(diào)上變化；轉(zhuǎn)調(diào)
Grammar To alter (a word) by inflection.
【語(yǔ)法】 變化字尾：通過(guò)詞尾變化改變（一詞）
To turn from a course or a specified alignment; bend.
彎曲：從一路線或特定的隊(duì)列上的發(fā)生偏轉(zhuǎn)；彎曲
v.intr.Grammar （不及物動(dòng)詞）【語(yǔ)法】
To be modified by inflection.
以詞尾變化改變
To give all of the inflected forms of a word; to provide a paradigm.
詞形變化形式：給出一個(gè)單詞所有的屈折變化形式；提供詞形變化表

來(lái)源：
Middle English inflecten [to bend down]
中古英語(yǔ) inflecten [彎下]
from Latin onflectere
源自 拉丁語(yǔ) onflectere
in- [in] * see in- 2
in- [在] *參見(jiàn) in-2
flectere [to bend]
flectere [彎曲]

【引伸】
inflec.tive
adj.（形容詞）
inflec.tor
n.（名詞）