medevac

今日も Reader's Digest 12/1月合併号の記事 'You Own Every Bullet' から引用します。
Our MRAP raced to where the truck had turned around, spotlights piercing the darkness, guns up and out. Two men--dumped from the truck--lay on the ground, on twitching and bleeding. The platoon medic kept them alive until a medevac helicopter arrived and ferried them to a hospital.
"medevac" を辞書で引きます。
・Oxford English Dictionary: The evacuation of military or other casualties to the hospital in a helicopter or airplane.: Five men were injured and were lifted by medevac helicopter to another base in Iraq.
上記は名詞としての説明ですが、"medevac" は動詞、形容詞としても使われ、下記は形容詞としての説明です。
・Collins Dictionary: of or having to do with such an evacuation or the aircraft used, esp. helicopters

"medevac" は "medical" と "evacuation" から生まれた合成語ですね。

keep tabs on

Reader's Digest 12/1月合併号の記事 'The Life Saver on Dad's Computer Screen' から引用します。
Arlyn's house was a 40-minute drive from the cottage, and she had been relying on a patchwork of technology to keep tabs on her dad. She set an open laptop on the counter so she could chat with him on Skype. She installed a camera in his kitchen and another in his bedroom so she could check whether he had fallen.
"keep tabs on" ですが、その後の文にSkypeとか観察用のカメラの事が出てくるので、言葉は悪いけれど監視するの意味の様です。辞書を見ます。
・Collins Dictionary: to keep a check on; follow or watch every move of: I don't know where she was headed after that - we don't keep tabs on our guests.

・Farlex Dictionary of Idioms: To routinely monitor or observe someone or something; to keep track of someone or something. It was revealed that the FBI kept tabs on him for years just because he once attended a meeting of a radical group.
この "keep tabs on" は日産のカルロス・ゴーン元会長に関する記事にも出ていました。（Automotive News Jan.21, 2019）
Ghosn pledged to surrender his passport, stay in Japan, confine himself to an apartment in Tokyo and even hire a private security detail approved by prosecutors to keep tabs on him.