From malakos; softness, i.e. Enervation (debility) -- disease.
see GREEK malakos
1. properly, softness (from Herodotus down).
2. in the N. T. (like ἀσθένεια, ἀρρωστία) infirmity, debility, bodily weakness, sickness (the Sept. for חלִי, disease, Deuteronomy 7:15; Deuteronomy 28:61; Isaiah 38:9, etc.); joined with νόσος, Matthew 4:23; Matthew 9:35; Matthew 10:1.