See in love

(transitive with with) Enamored (of a person, etc.) / (transitive with with) (informal) Very fond (of an idea, etc.)

(informal) Ellipsis of in the pink of health. / (informal) Nude, naked.

(colloquial) To begin eating. / (colloquial) To engage in a burst of hard work. / (military, also figuratively in sports) To dig trenches to resist an enemy attack.

(music) Having the correct musical pitch. / (figuratively, usually with "with") In an understanding relationship (with something or someone).

(simile, colloquial) Very cosy and comfortable.

(physics) The ratio of the speed of light in air or vacuum to that in another medium.

In a state of suspension; nebulous and unfulfilled. / (law) In abeyance.

Do not dedicate all your resources to one project. / Do not count on any one thing to safeguard what is valuable.

(idiomatic, by ellipsis) Adjust to local customs.