"relatively frail" is correct and usable in written English.
It can be used to describe someone's physical state or condition that is not as strong as it could be. For example, "The elderly man was relatively frail and needed assistance walking."
He continues to look relatively frail and his health remains the focus of intense speculation.
He is relatively frail, by today's major league standards, with an undeveloped torso, spaghetti arms and a thin neck.
The trimaran, a relatively frail thing that was never designed for polar waters, let alone sea battles, reportedly cost more than a million dollars.
Meg was my last dog, gutsy and so kind but relatively frail, even as a pup, and as soon as he named her I wondered whether she would die.
But if a trade surplus is the normal state of affairs for the world's largest exporting nation, the new normal could be smaller surpluses, reflecting China's growing domestic demand and the relatively frail health of the world's other major economies.
The king continued to look relatively frail during his appearance on Friday, but Palakorn Suwanarat, a member of the king's privy council, said on Thursday that the king would be leaving the hospital soon.
It remains unclear whether the improvements observed in these two studies can be attributed to ACE inhibitors per se, reflect the natural history of delirium or better tolerance of these medications by relatively less frail individuals.
The BWHHS study respondents were those who were able to attend the interview and medical examination at baseline suggests that they were relatively less frail compared to non-responders.
Our findings suggest that good quality building design in ECH can support the quality of life of residents, but that designing features that support the needs of both relatively independent and frail users is problematic, with the needs of highly dependent users not currently supported as well as could be hoped by ECH schemes.
The attrition analysis indicated that the nonparticipants who were relatively older and frail, had measurements indicating central adiposity and muscle loss.
The strata are: (A) participants without complex care needs and with a relatively low frailty level; (B) frail participants at risk of complex care needs; and (C) participants with complex care needs.
