1. -less an adjective-forming suffixmeaning “without,”“not having” that specified by the nounbase (careless; shameless); added to verbs, it is equivalent to “un-” plus the presentparticiple of the verb, or “un-” plus the verbplus “-able” (quenchless; tireless).
Etymology: (ME -les, OE -lēas, suffixal use of lēas free from, without, false, c. OS, OHG
Definition of '-less'
Webster Dictionary
1. -less a privative adjective suffix, denoting without, destitute of, not having; as witless, childless, fatherless
Definitions of -less 
