A steadier ground guide to the word that will not come. What is failing, what actually helps in the moment, and how to tell this apart from a stroke. If the difficulty started suddenly, within minutes or hours, stop reading and call 911.
Notice your own urge to finish the sentence for him. That urge comes from love and impatience at the same time, and one breath is usually the difference between helping him find the word and taking it from him.
Before anything else, the timescale is the whole question. Word-finding trouble that came on over months is the illness. Word-finding trouble that arrived this morning, within minutes or hours, is an emergency. Call 911 even if it has already passed.
Insight is usually preserved well into this illness, meaning he knows precisely what is happening to him, and depression severity and language severity track each other closely. That has two consequences, and both belong on this page. One is that his frustration is not confusion, it is grief. The other is in the red flags below.
Hearing belongs here too, since an uncorrected hearing loss looks a great deal like a comprehension problem and is the cheapest thing on the list to fix.
Change the conditions around the conversation, since that helps more reliably than anything you can do inside it.
Note when it is worst, since it is rarely constant. Fatigue, noise, being put on the spot and being asked direct questions in front of other people all make it worse, which lets you move the conversations that matter to the morning and the quiet room. Note also whether the loss is holding steady or moving, and whether it has ever arrived abruptly, since a sudden step down is a different event from a slow slope.
Print the one-page log if you want somewhere to keep this, and take it to the appointment.
There is one thing here that is time-limited. While he still has the words, get the paperwork done: health care proxy, advance directive, powers of attorney, access to the accounts. Not because the end is near, since survival is measured in years, but because in this illness the ability to say what he wants goes before the ability to know what he wants. Ask him now, while asking is still a conversation, and record his voice if he will let you.
This is what the tracking is for. Dates, times and specifics turn "something's off" into something a clinician can act on in a ten-minute appointment.
Finishing his sentence is the kindest-feeling thing to do and often the wrong one. A conversation where the word never arrived and neither of you gave up is a conversation that went well.