動詞 intone:

1. utter monotonously and repetitively and rhythmically
   同義詞：tone, chant
2. recite with musical intonation; recite as a chant or a psalm
   同義詞：chant, intonate, cantillate
3. speak carefully, as with rising and falling pitch or in a particular tone
   同義詞：intonate

in.tone

v.（動詞）
in.toned,in.ton.ing,in.tones
v.tr.（及物動詞）
To recite in a singing tone.
吟誦：以歌唱的聲調(diào)背誦
To utter in a monotone.
吟詠：以單調(diào)音吟出
v.intr.（不及物動詞）
To speak with a singing tone or with a particular intonation.
吟誦：以歌唱的聲調(diào)或以特殊的聲調(diào)說話
Music To sing a plainsong intonation.
【音樂】 唱素歌的起始短句

來源：
Middle English entonen
中古英語 entonen
from Old French entoner
源自 古法語 entoner
from Medieval Latin inton3re
源自 中世紀拉丁語 inton3re
Latin in- [in] * see in- 2
拉丁語 in- [在…里面] *參見 in-2
Latin tonus [tone] * see tone
拉丁語 tonus [聲調(diào)] *參見 tone

【引伸】
intone.ment
n.（名詞）
inton.er
n.（名詞）