vt.设防于，增强（体力，结构等）使坚强，增加，（酒）的酒精含量vi.筑防御工事

英文释义

v. t. To add strength to; to strengthen; to confirm; to furnish with power to resist attack.

v. t. To strengthen and secure by forts or batteries, or by surrounding with a wall or ditch or other military works; to render defensible against an attack by hostile forces.

v. i. To raise defensive works.

词干

fortify 加强
→ 来自fort， 坚固，坚强，堡垒。