helpless
1. [ adjective ] lacking in or deprived of strength or power
Synonyms: incapacitated
Examples:

"lying ill and helpless" "helpless with laughter"

Related terms: powerless
2. [ adjective ] unable to function; without help
Synonyms: lost
Related terms: hopeless
3. [ adjective ] unable to manage independently
Examples:

"as helpless as a baby"

Related terms: dependent
Similar spelling:   helplessly
  helpfulness
  helpful