The definition of investigate is to look into something or someone in order to try to discover the truth or to piece together a sequence of events.
1603, John Florio, translating Michel de Montaigne, Essays, II.35:
(Informal) To work or study hard
Inquire is defined as to look into something, to ask a question or to ask for information.
To delve into and make use of; exploit:
To search or examine with continued care; to seek diligently.
To make a search or investigation:
To dig out (earth, soil, etc.)
Grub is defined as to dig, search through or work very hard.
(Music, often with "up") To begin a vocal note slightly below the target pitch and then to slide up to the target pitch, especially in country music.
To clean or dig out (a path, etc.) with a shovel
Spade means to dig.
Enter is defined as to come in, put in or get in.
The definition of cut into means to make an opening in, generally with something sharp.
To penetrate or explore physically, especially with a probe, in order to find or discover something:
To question formally, as to elicit facts or information; interrogate:
To observe and evaluate (a talented person), as for possible hiring.
Find another word for delve. In this page you can discover 21 synonyms, antonyms, idiomatic expressions, and related words for delve, like: investigate, search, dig, explore, inquire, mine, research, seek, look into, reconnoiter and excavate.