“The idea was to use armoured force to penetrate deep into the enemy rear in order to destroy its command and control systems.”

“So true was he to his own little light that many dismissed him as a crank and made little effort to penetrate his prose or make sense of his ideas.”

“Mel echoed, letting the words slowly penetrate.”

“They had managed to penetrate Soviet defences.”

“Firewall is a software which blocks suspicious potentially dangerous connections to preventing viruses from network to penetrate into your system.”

“A cool breeze penetrated the mosquito netting.”