The phrase "able to utter his" is correct and usable in written English.
It can be used when discussing someone's capability to speak or express something verbally, often in a specific context.
Example: "After weeks of silence, he was finally able to utter his thoughts on the matter."
Alternatives: "capable of expressing his" or "able to articulate his".
The only words that Jones was able to utter were to tell his audience to "quieten down".
But other gestures often resulted in humiliating games of guessing, while the sounds he was able to utter failed to establish either his requirements or his shared nature as a human being — part of the Almighty's work, if differently made.
Until an Israeli leader is able to utter those words, there will be no peace.' Barenboim puts his money where his mouth is.
"I remember Marlon distinctly saying he had reached a certain point in his life where he was finally able to utter the words 'I just don't care,'" Depp told CBS.
When, in 1969, this vibrantly alive man, who over a lifetime generated more energy than a nuclear reactor, died after eight years as a drooling, stroke-afflicted paralytic able to utter only one word — "No!" — he had outlived four of his beloved nine children.
Breathing with the help of an oxygen tube and with his speech severely impaired, Judge Butzner is able to utter only one complete sentence: "I was against Starr, from start to finish".
A chorus of nymphs and shepherds join Orfeo around the tomb of his wife Euridice in a solemn chorus of mourning; Orfeo is only able to utter Euridice's name (Chorus and Orfeo: "Ah, se intorno"/"Ah! Dans ce bois").
Until an Israeli leader is able to utter those words there will be no peace.
She would not be able to utter a cross word to me, or raise a ruler.
For three years he was unable to speak, apart from being able to utter the single word "good".
