singly
Ἐς δὲ τὰ ἔσχατα νουσήματα αἱ ἔσχαται θεραπεῖαι ἐς ἀκριβείην, κράτισται -> For extreme diseases, extreme methods of cure, as to restriction, are most suitable.
Corpus Hippocraticum, Aphorisms 1.6.2English > Greek (Woodhouse)
adjective
each separately: P. καθ' ἕκαστον.
by oneself: P. and V. αὐτός, καθ' αὑτόν.