invasive

UK: /ɪnˈveɪsɪv/ US: (in vā′siv)

WordReference Random House Unabridged Dictionary of American English © 2025

in•va•sive  (in vā′siv), adj. 

1. characterized by or involving invasion;
   offensive:
   invasive war.
2. invading, or tending to invade;
   intrusive.
3. Medicine requiring the entry of a needle, catheter, or other instrument into a part of the body, esp. in a diagnostic procedure, as a biopsy.

• Medieval Latin invāsīvus. See invasion, -ive
• late Middle English 1400–50

Collins Concise English Dictionary © HarperCollins Publishers::

invasive / ɪnˈveɪsɪv/ adjective

1. of or relating to an invasion, intrusion, etc
2. (of surgery) involving making a relatively large incision in the body to gain access to the target of the surgery, as opposed to making a small incision or gaining access endoscopically through a natural orifice

inˈvasively adverb