steel, metal, barrier, wise, attentive, alert, friendly, teachably, concise,

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Size: 6000px × 4000px
Photo credit: © manfredxy / Alamy / Afripics
License: Royalty Free
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Keywords: alert, attentive, barbed, barbwire, barrier, border, boundary, concise, fence, fencing, friendly, metal, pronounced, protect, protection, safety, sagacious, sage, security, sharp, significant, steel, teachably, wire, wise