interested

appear, be, feel, look, seem, sound

become, get

My son became interested in dinosaurs after visiting the natural history museum last month.

remain

get sb

The teacher tried hard to get the students interested in reading classic novels.

keep sb

The teacher used stories and games to keep the students interested during the long lesson.

deeply, especially, extremely, greatly, intensely, keenly, more than a little, most, particularly, passionately, really, seriously, specially, terribly, very (much)

She was deeply interested in learning about marine biology after visiting the aquarium last summer.

genuinely, truly

increasingly

not at all, not (in) the least bit, not in the least, not remotely

My sister was not remotely interested in attending the boring family dinner last weekend.

only half, not much, not very

My son was not very interested in the museum exhibit, so we left early.

fairly, mildly, quite, vaguely

just

She's just interested in learning more about how the new technology works.

enough, sufficiently

My son wasn't sufficiently interested in the piano lessons to practice regularly.

chiefly, mainly, primarily, principally

always, long

She has always been interested in learning new languages since childhood.

still

no longer

potentially

apparently, reportedly

clearly, obviously

actively

My daughter has been actively interested in learning guitar since she started lessons last month.

professionally

in

My son became interested in dinosaurs when he was five years old.