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Webster 1913 Edition

Adj.

Not to be wielded; unmanageable; unwieldy.

[R.]

“Wieldless might.”

Spenser.

Adj.

Unmanageable.

wieldless ‎(comparative more wieldless, superlative most wieldless)

(obsolete) Not to be wielded; unmanageable; unwieldy. [16th c.]
- 1596, Edmund Spenser, The Faerie Queene, IV.3:
  with the weight of his owne weeldlesse might / He falleth nigh to ground, and scarse recovereth flight.