convalesce
v.
late 15c., from Latin convalescere "thrive, regain health," from com-, intensive prefix (see com-), + valescere "to begin to grow strong," inchoative of valere "to be strong" (see valiant). Only in Caxton and Scottish writers until 19c. Related: Convalesced; convalescing.
〔李〕[con-(com-);val;-escev.] v.复原，恢复，康复； 渐愈 ←val,vail (L valere,valitum)=to be worth or strong 价值，强壮
〔蒋〕[con-用作加强意义，val强→健康，-esce动词后缀，表示动作开始或正在进行] 渐愈，恢复健康